A+B Problem (0 + EOL)

本文介绍了一个简单的C++程序,该程序使用循环结构连续读取两个整数并输出它们的和,直到输入结束。代码展示了如何结合使用C++的iostream和C语言的puts函数来实现友好的输出格式。
部署运行你感兴趣的模型镜像

代码:

#include <iostream>
#include <cstdio>             
using namespace std;
int main()
{
    int a,b;
    int c =0;
    while(cin>>a>>b && (a||b))
    {
        if(c > 0)puts("");
        c++;
        cout<<a + b<<endl;
    }
    return 0;
}

这里puts是C函数,puts()函数用来向标准输出设备写字符串并换行,等效:printf("%s\n",s),前提:s是C风格字符串,最后以'\0'结尾。

留个坑,我觉得这代码出来的格式还是有问题啊。。。。

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下面是我按照你的思路执行指令后终端打印的结果(base) casbot@casbot:~/ros_catkin_ws$ # 备份原文件 sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak # 使用清华源(Ubuntu 22.04) sudo sed -i 's@//.*archive.ubuntu.com@//mirrors.tuna.tsinghua.edu.cn@g' /etc/apt/sources.list sudo apt update && sudo apt upgrade -y Ign:1 http://deb.repo.autolabor.com.cn jammy InRelease Ign:2 http://deb.repo.autolabor.com.cn jammy Release Ign:3 http://deb.repo.autolabor.com.cn jammy/main all Packages Ign:4 http://deb.repo.autolabor.com.cn jammy/main amd64 Packages Hit:5 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy InRelease Ign:6 http://deb.repo.autolabor.com.cn jammy/main Translation-en Ign:3 http://deb.repo.autolabor.com.cn jammy/main all Packages Hit:7 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates InRelease Ign:4 http://deb.repo.autolabor.com.cn jammy/main amd64 Packages Hit:8 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-backports InRelease Ign:6 http://deb.repo.autolabor.com.cn jammy/main Translation-en Hit:9 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-security InRelease Ign:3 http://deb.repo.autolabor.com.cn jammy/main all Packages Get:10 http://mirrors.tuna.tsinghua.edu.cn/ros2/ubuntu jammy InRelease [4682 B] Hit:11 http://packages.ros.org/ros/ubuntu focal InRelease Ign:4 http://deb.repo.autolabor.com.cn jammy/main amd64 Packages Ign:6 http://deb.repo.autolabor.com.cn jammy/main Translation-en Ign:3 http://deb.repo.autolabor.com.cn jammy/main all Packages Hit:4 http://deb.repo.autolabor.com.cn jammy/main amd64 Packages Ign:6 http://deb.repo.autolabor.com.cn jammy/main Translation-en Ign:3 http://deb.repo.autolabor.com.cn jammy/main all Packages Ign:6 http://deb.repo.autolabor.com.cn jammy/main Translation-en Ign:3 http://deb.repo.autolabor.com.cn jammy/main all Packages Ign:6 http://deb.repo.autolabor.com.cn jammy/main Translation-en Ign:3 http://deb.repo.autolabor.com.cn jammy/main all Packages Ign:6 http://deb.repo.autolabor.com.cn jammy/main Translation-en Fetched 4682 B in 3s (1850 B/s) Reading package lists... Done Building dependency tree... Done Reading state information... Done 80 packages can be upgraded. Run 'apt list --upgradable' to see them. Reading package lists... Done Building dependency tree... Done Reading state information... Done Calculating upgrade... Done Get more security updates through Ubuntu Pro with 'esm-apps' enabled: exo-utils libzvbi-common libzbar0 libheif1 libiperf0 libmujs1 libavdevice58 ffmpeg libopenexr25 libpostproc55 libmagickcore-6.q16-6-extra libavcodec58 libgstreamer-plugins-bad1.0-0 iperf3 libmagickwand-6.q16-6 libavutil56 libswscale5 libmagickcore-6.q16-6 libexo-2-0 libgsl27 gir1.2-gst-plugins-bad-1.0 libswresample3 imagemagick-6-common libavformat58 libzvbi0 gstreamer1.0-plugins-bad libgslcblas0 libde265-0 libexo-common libavfilter7 Learn more about Ubuntu Pro at https://ubuntu.com/pro The following NEW packages will be installed: libxcvt-dev The following packages have been kept back: dvb-tools ir-keytable libdvbv5-0 libdvbv5-dev libv4l-0 libv4l-dev libv4l2rds0 libv4lconvert0 qv4l2 v4l-utils xserver-common xserver-xorg-core xserver-xorg-legacy The following packages will be upgraded: apport ghostscript ghostscript-x gir1.2-javascriptcoregtk-4.0 gir1.2-soup-2.4 gir1.2-webkit2-4.0 git git-man libarchive13 libblockdev-crypto2 libblockdev-fs2 libblockdev-loop2 libblockdev-part-err2 libblockdev-part2 libblockdev-swap2 libblockdev-utils2 libblockdev2 libdjvulibre-text libdjvulibre21 libdvbv5-doc libgnutls30 libgs9 libgs9-common libjavascriptcoregtk-4.0-18 libnss-systemd libpam-modules libpam-modules-bin libpam-runtime libpam-systemd libpam0g libprotobuf23 libpython3.10 libpython3.10-dev libpython3.10-minimal libpython3.10-stdlib libre2-9 libsoup-gnome2.4-1 libsoup2.4-1 libsoup2.4-common libssh-4 libssh-gcrypt-4 libsystemd0 libudev1 libudisks2-0 libvpx7 libwebkit2gtk-4.0-37 libxslt1.1 linux-libc-dev python3-apport python3-pip python3-problem-report python3-protobuf python3-requests python3-urllib3 python3.10 python3.10-dev python3.10-minimal sudo systemd systemd-sysv ubuntu-advantage-tools ubuntu-pro-client ubuntu-pro-client-l10n udev udisks2 xserver-xorg-dev xwayland 67 upgraded, 1 newly installed, 0 to remove and 13 not upgraded. 62 standard LTS security updates Need to get 77.1 MB of archives. After this operation, 64.5 kB of additional disk space will be used. Get:1 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libpam0g arm64 1.4.0-11ubuntu2.6 [59.7 kB] Get:2 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libpam-modules-bin arm64 1.4.0-11ubuntu2.6 [38.6 kB] Get:3 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libpam-modules arm64 1.4.0-11ubuntu2.6 [279 kB] Get:4 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libnss-systemd arm64 249.11-0ubuntu3.16 [133 kB] Get:5 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libsystemd0 arm64 249.11-0ubuntu3.16 [314 kB] Get:6 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 systemd-sysv arm64 249.11-0ubuntu3.16 [10.5 kB] Get:7 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libpam-systemd arm64 249.11-0ubuntu3.16 [205 kB] Get:8 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 systemd arm64 249.11-0ubuntu3.16 [4423 kB] Get:9 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 udev arm64 249.11-0ubuntu3.16 [1541 kB] Get:10 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libudev1 arm64 249.11-0ubuntu3.16 [74.5 kB] Get:11 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libpam-runtime all 1.4.0-11ubuntu2.6 [40.2 kB] Get:12 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libgnutls30 arm64 3.7.3-4ubuntu1.7 [922 kB] Get:13 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 python3.10-dev arm64 3.10.12-1~22.04.10 [508 kB] Get:14 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libpython3.10-dev arm64 3.10.12-1~22.04.10 [4666 kB] Get:15 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libpython3.10 arm64 3.10.12-1~22.04.10 [1885 kB] Get:16 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 python3.10 arm64 3.10.12-1~22.04.10 [508 kB] Get:17 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libpython3.10-stdlib arm64 3.10.12-1~22.04.10 [1846 kB] Get:18 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 python3.10-minimal arm64 3.10.12-1~22.04.10 [2260 kB] Get:19 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libpython3.10-minimal arm64 3.10.12-1~22.04.10 [812 kB] Get:20 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 sudo arm64 1.9.9-1ubuntu2.5 [807 kB] Get:21 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 ubuntu-pro-client-l10n arm64 36ubuntu0~22.04 [20.6 kB] Get:22 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 ubuntu-pro-client arm64 36ubuntu0~22.04 [236 kB] Get:23 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 ubuntu-advantage-tools all 36ubuntu0~22.04 [10.9 kB] Get:24 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 python3-problem-report all 2.20.11-0ubuntu82.9 [11.4 kB] Get:25 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 python3-apport all 2.20.11-0ubuntu82.9 [89.0 kB] Get:26 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 apport all 2.20.11-0ubuntu82.9 [135 kB] Get:27 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 ghostscript-x arm64 9.55.0~dfsg1-0ubuntu5.12 [48.0 kB] Get:28 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 ghostscript arm64 9.55.0~dfsg1-0ubuntu5.12 [49.7 kB] Get:29 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libgs9 arm64 9.55.0~dfsg1-0ubuntu5.12 [4956 kB] Get:30 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libgs9-common all 9.55.0~dfsg1-0ubuntu5.12 [753 kB] Get:31 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 gir1.2-webkit2-4.0 arm64 2.48.3-0ubuntu0.22.04.1 [105 kB] Get:32 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 gir1.2-javascriptcoregtk-4.0 arm64 2.48.3-0ubuntu0.22.04.1 [39.0 kB] Get:33 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libwebkit2gtk-4.0-37 arm64 2.48.3-0ubuntu0.22.04.1 [26.2 MB] Get:34 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libjavascriptcoregtk-4.0-18 arm64 2.48.3-0ubuntu0.22.04.1 [8729 kB] Get:35 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 gir1.2-soup-2.4 arm64 2.74.2-3ubuntu0.6 [31.8 kB] Get:36 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libsoup-gnome2.4-1 arm64 2.74.2-3ubuntu0.6 [6194 B] Get:37 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libsoup2.4-common all 2.74.2-3ubuntu0.6 [4778 B] Get:38 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libsoup2.4-1 arm64 2.74.2-3ubuntu0.6 [281 kB] Get:39 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libxslt1.1 arm64 1.1.34-4ubuntu0.22.04.4 [161 kB] Get:40 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 git-man all 1:2.34.1-1ubuntu1.15 [955 kB] Get:41 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 git arm64 1:2.34.1-1ubuntu1.15 [3224 kB] Get:42 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libarchive13 arm64 3.6.0-1ubuntu1.5 [367 kB] Get:43 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libblockdev-utils2 arm64 2.26-1ubuntu0.1 [15.5 kB] Get:44 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libblockdev-crypto2 arm64 2.26-1ubuntu0.1 [17.3 kB] Get:45 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libblockdev-part-err2 arm64 2.26-1ubuntu0.1 [5650 B] Get:46 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libblockdev-fs2 arm64 2.26-1ubuntu0.1 [21.5 kB] Get:47 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libblockdev-loop2 arm64 2.26-1ubuntu0.1 [6838 B] Get:48 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libblockdev-part2 arm64 2.26-1ubuntu0.1 [15.0 kB] Get:49 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libblockdev-swap2 arm64 2.26-1ubuntu0.1 [7452 B] Get:50 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libblockdev2 arm64 2.26-1ubuntu0.1 [45.5 kB] Get:51 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libdjvulibre-text all 3.5.28-2ubuntu0.22.04.1 [51.0 kB] Get:52 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libdjvulibre21 arm64 3.5.28-2ubuntu0.22.04.1 [590 kB] Get:53 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy/main arm64 libdvbv5-doc all 1.22.1-2build1 [1479 kB] Get:54 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libprotobuf23 arm64 3.12.4-1ubuntu7.22.04.4 [809 kB] Get:55 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy/main arm64 libre2-9 arm64 20220201+dfsg-1 [153 kB] Get:56 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libssh-4 arm64 0.9.6-2ubuntu0.22.04.4 [185 kB] Get:57 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libssh-gcrypt-4 arm64 0.9.6-2ubuntu0.22.04.4 [224 kB] Get:58 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libudisks2-0 arm64 2.9.4-1ubuntu2.2 [168 kB] Get:59 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 libvpx7 arm64 1.11.0-2ubuntu2.4 [1042 kB] Get:60 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy/main arm64 libxcvt-dev arm64 0.1.1-3 [3236 B] Get:61 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 linux-libc-dev arm64 5.15.0-144.157 [1294 kB] Get:62 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/universe arm64 python3-pip all 22.0.2+dfsg-1ubuntu0.6 [1306 kB] Get:63 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 python3-protobuf arm64 3.12.4-1ubuntu7.22.04.4 [352 kB] Get:64 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 python3-urllib3 all 1.26.5-1~exp1ubuntu0.3 [98.6 kB] Get:65 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 python3-requests all 2.25.1+dfsg-2ubuntu0.3 [48.8 kB] Get:66 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 udisks2 arm64 2.9.4-1ubuntu2.2 [275 kB] Get:67 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 xserver-xorg-dev arm64 2:21.1.4-2ubuntu1.7~22.04.15 [205 kB] Get:68 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates/main arm64 xwayland arm64 2:22.1.1-1ubuntu0.19 [918 kB] Fetched 77.1 MB in 4min 46s (270 kB/s) Extracting templates from packages: 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(Reading database ... 126982 files and directories currently installed.) Preparing to unpack .../libpam0g_1.4.0-11ubuntu2.6_arm64.deb ... Unpacking libpam0g:arm64 (1.4.0-11ubuntu2.6) over (1.4.0-11ubuntu2.5) ... Setting up libpam0g:arm64 (1.4.0-11ubuntu2.6) ... (Reading database ... 126982 files and directories currently installed.) Preparing to unpack .../libpam-modules-bin_1.4.0-11ubuntu2.6_arm64.deb ... Unpacking libpam-modules-bin (1.4.0-11ubuntu2.6) over (1.4.0-11ubuntu2.5) ... Setting up libpam-modules-bin (1.4.0-11ubuntu2.6) ... (Reading database ... 126982 files and directories currently installed.) Preparing to unpack .../libpam-modules_1.4.0-11ubuntu2.6_arm64.deb ... Unpacking libpam-modules:arm64 (1.4.0-11ubuntu2.6) over (1.4.0-11ubuntu2.5) ... Setting up libpam-modules:arm64 (1.4.0-11ubuntu2.6) ... Installing new version of config file /etc/security/namespace.init ... (Reading database ... 126982 files and directories currently installed.) 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Setting up libblockdev-swap2:arm64 (2.26-1ubuntu0.1) ... Setting up libdjvulibre21:arm64 (3.5.28-2ubuntu0.22.04.1) ... Setting up libnss-systemd:arm64 (249.11-0ubuntu3.16) ... Setting up libblockdev-loop2:arm64 (2.26-1ubuntu0.1) ... Setting up ghostscript-x (9.55.0~dfsg1-0ubuntu5.12) ... Setting up libblockdev2:arm64 (2.26-1ubuntu0.1) ... Setting up libblockdev-part2:arm64 (2.26-1ubuntu0.1) ... Setting up python3.10-minimal (3.10.12-1~22.04.10) ... Setting up apport (2.20.11-0ubuntu82.9) ... apport-autoreport.service is a disabled or a static unit, not starting it. Setting up libpython3.10-stdlib:arm64 (3.10.12-1~22.04.10) ... Setting up python3-requests (2.25.1+dfsg-2ubuntu0.3) ... Setting up libblockdev-fs2:arm64 (2.26-1ubuntu0.1) ... Setting up git (1:2.34.1-1ubuntu1.15) ... Setting up libwebkit2gtk-4.0-37:arm64 (2.48.3-0ubuntu0.22.04.1) ... Setting up libpam-systemd:arm64 (249.11-0ubuntu3.16) ... Setting up ubuntu-advantage-tools (36ubuntu0~22.04) ... Setting up libsoup-gnome2.4-1:arm64 (2.74.2-3ubuntu0.6) ... Setting up udisks2 (2.9.4-1ubuntu2.2) ... Setting up libpython3.10:arm64 (3.10.12-1~22.04.10) ... Setting up python3.10 (3.10.12-1~22.04.10) ... Setting up gir1.2-soup-2.4:arm64 (2.74.2-3ubuntu0.6) ... Setting up libpython3.10-dev:arm64 (3.10.12-1~22.04.10) ... Setting up python3.10-dev (3.10.12-1~22.04.10) ... Setting up gir1.2-webkit2-4.0:arm64 (2.48.3-0ubuntu0.22.04.1) ... Processing triggers for hicolor-icon-theme (0.17-2) ... Processing triggers for doc-base (0.11.1) ... Processing 1 added doc-base file... Error in `/usr/share/doc-base/libdvbv5-doc.libdvbv5-reference', line 9: all `Format' sections are invalid. Note: `install-docs --verbose --check file_name' may give more details about the above error. Processing triggers for gnome-menus (3.36.0-1ubuntu3) ... Processing triggers for libc-bin (2.35-0ubuntu3.10) ... Processing triggers for man-db (2.10.2-1) ... Processing triggers for dbus (1.12.20-2ubuntu4.1) ... Processing triggers for mailcap (3.70+nmu1ubuntu1) ... Processing triggers for bamfdaemon (0.5.6+22.04.20220217-0ubuntu1) ... Rebuilding /usr/share/applications/bamf-2.index... Processing triggers for desktop-file-utils (0.26-1ubuntu3) ... (base) casbot@casbot:~/ros_catkin_ws$ sudo sh -c 'echo "deb https://mirrors.ustc.edu.cn/ros/ubuntu $(lsb_release -sc) main" > /etc/apt/sources.list.d/ros-noetic.list' sudo apt-key adv --keyserver 'hkp://keyserver.ubuntu.com:80' --recv-key C1CF6E31E6BADE8868B172B4F42ED6FBAB17C654 Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)). Executing: /tmp/apt-key-gpghome.6cqeROMOQT/gpg.1.sh --keyserver hkp://keyserver.ubuntu.com:80 --recv-key C1CF6E31E6BADE8868B172B4F42ED6FBAB17C654 gpg: key F42ED6FBAB17C654: "Open Robotics <info@osrfoundation.org>" not changed gpg: Total number processed: 1 gpg: unchanged: 1 (base) casbot@casbot:~/ros_catkin_ws$ sudo apt update # 安装桌面完整版(约 1.5GB,网络不稳定时分段安装) sudo apt install ros-noetic-desktop-full -y --allow-unauthenticated Ign:1 http://deb.repo.autolabor.com.cn jammy InRelease Ign:2 http://deb.repo.autolabor.com.cn jammy Release Ign:3 http://deb.repo.autolabor.com.cn jammy/main all Packages Ign:4 http://deb.repo.autolabor.com.cn jammy/main amd64 Packages Ign:5 http://deb.repo.autolabor.com.cn jammy/main Translation-en Ign:3 http://deb.repo.autolabor.com.cn jammy/main all Packages Ign:4 http://deb.repo.autolabor.com.cn jammy/main amd64 Packages Ign:5 http://deb.repo.autolabor.com.cn jammy/main Translation-en Ign:3 http://deb.repo.autolabor.com.cn jammy/main all Packages Ign:4 http://deb.repo.autolabor.com.cn jammy/main amd64 Packages Ign:5 http://deb.repo.autolabor.com.cn jammy/main Translation-en Ign:3 http://deb.repo.autolabor.com.cn jammy/main all Packages Ign:6 https://mirrors.ustc.edu.cn/ros/ubuntu jammy InRelease Hit:4 http://deb.repo.autolabor.com.cn jammy/main amd64 Packages Err:7 https://mirrors.ustc.edu.cn/ros/ubuntu jammy Release 404 Not Found [IP: 202.141.176.110 443] Ign:5 http://deb.repo.autolabor.com.cn jammy/main Translation-en Ign:3 http://deb.repo.autolabor.com.cn jammy/main all Packages Ign:5 http://deb.repo.autolabor.com.cn jammy/main Translation-en Ign:3 http://deb.repo.autolabor.com.cn jammy/main all Packages Ign:5 http://deb.repo.autolabor.com.cn jammy/main Translation-en Ign:3 http://deb.repo.autolabor.com.cn jammy/main all Packages Ign:5 http://deb.repo.autolabor.com.cn jammy/main Translation-en Hit:8 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy InRelease Hit:9 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-updates InRelease Hit:10 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-backports InRelease Hit:11 http://packages.ros.org/ros/ubuntu focal InRelease Hit:12 http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports jammy-security InRelease Get:13 http://mirrors.tuna.tsinghua.edu.cn/ros2/ubuntu jammy InRelease [4682 B] Reading package lists... Done E: The repository 'https://mirrors.ustc.edu.cn/ros/ubuntu jammy Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. Reading package lists... Done Building dependency tree... Done Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: gazebo11 : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libboost-iostreams1.71.0 but it is not installable Depends: libboost-program-options1.71.0 but it is not installable Depends: libboost-regex1.71.0-icu66 but it is not installable Depends: libboost-thread1.71.0 but it is not installable Depends: libgazebo11 (= 11.15.1-1~focal) but it is not going to be installed Depends: libignition-msgs5 (>= 5.11.0) but it is not going to be installed Depends: libignition-transport8 (>= 8.5.0) but it is not going to be installed Depends: libprotobuf17 but it is not installable Depends: gazebo11-common (>= 11.2.0) but it is not going to be installed Recommends: gazebo11-plugin-base but it is not going to be installed libgazebo11-dev : Depends: libignition-transport8-dev but it is not going to be installed Depends: libignition-msgs5-dev but it is not going to be installed Depends: libignition-fuel-tools4-dev but it is not going to be installed Depends: libignition-common3-dev but it is not going to be installed Depends: libignition-common3-graphics-dev but it is not going to be installed Depends: libdart6-collision-bullet-dev (< 6.10.0) but it is not installable or libdart-collision-bullet-dev (< 6.10.0) but it is not going to be installed Depends: libdart6-collision-ode-dev (< 6.10.0) but it is not installable or libdart-collision-ode-dev (< 6.10.0) but it is not going to be installed Depends: libdart6-utils-urdf-dev (< 6.10.0) but it is not installable or libdart-utils-urdf-dev (< 6.10.0) but it is not going to be installed Depends: libdart6-external-odelcpsolver-dev (< 6.10.0) but it is not installable or libdart-external-odelcpsolver-dev (< 6.10.0) but it is not going to be installed Depends: libdart6-external-ikfast-dev (< 6.10.0) but it is not installable or libdart-external-ikfast-dev (< 6.10.0) but it is not going to be installed Depends: libgazebo11 (= 11.15.1-1~focal) but it is not going to be installed Depends: gazebo11-common (>= 11.2.0) but it is not going to be installed Depends: gazebo11-plugin-base (= 11.15.1-1~focal) but it is not going to be installed libicu-dev : Depends: libicu70 (= 70.1-2) but 70.1-2ubuntu1 is to be installed libjsoncpp-dev : Depends: libjsoncpp25 (= 1.9.5-3) but 1.9.5-3ubuntu0.1 is to be installed ros-noetic-actionlib : Depends: libboost-thread1.71.0 but it is not installable ros-noetic-actionlib-tutorials : Depends: libboost-thread1.71.0 but it is not installable ros-noetic-bondcpp : Depends: libboost-thread1.71.0 but it is not installable ros-noetic-camera-calibration-parsers : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libboost-python1.71.0 but it is not installable Depends: libboost-python1.71.0-py38 but it is not installable Depends: libpython3.8 (>= 3.8.2) but it is not installable Depends: libyaml-cpp0.6 (>= 0.6.2) but it is not installable ros-noetic-class-loader : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: libpocofoundation62 (>= 1.9.2) but it is not installable ros-noetic-compressed-depth-image-transport : Depends: libconsole-bridge0.4 but it is not installable Depends: libopencv-core4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgcodecs4.2 (>= 4.2.0+dfsg) but it is not installable ros-noetic-compressed-image-transport : Depends: libconsole-bridge0.4 but it is not installable Depends: libopencv-core4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgcodecs4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgproc4.2 (>= 4.2.0+dfsg) but it is not installable ros-noetic-controller-manager : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: libtinyxml2-6a (>= 5.0.0) but it is not installable ros-noetic-cpp-common : Depends: libconsole-bridge0.4 but it is not installable ros-noetic-cv-bridge : Depends: libboost-python1.71.0 but it is not installable Depends: libboost-python1.71.0-py38 but it is not installable Depends: libboost-regex1.71.0-icu66 but it is not installable Depends: libopencv-core4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgcodecs4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgproc4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libpython3.8 (>= 3.8.2) but it is not installable ros-noetic-depth-image-proc : Depends: libconsole-bridge0.4 but it is not installable Depends: libopencv-calib3d4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-core4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgproc4.2 (>= 4.2.0+dfsg) but it is not installable ros-noetic-diagnostic-aggregator : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libboost-regex1.71.0-icu66 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: libtinyxml2-6a (>= 5.0.0) but it is not installable ros-noetic-diagnostic-common-diagnostics : Depends: hddtemp but it is not installable ros-noetic-diff-drive-controller : Depends: libconsole-bridge0.4 but it is not installable Depends: liburdfdom-model but it is not installable ros-noetic-eigen-conversions : Depends: liborocos-kdl1.4 but it is not installable ros-noetic-filters : Depends: libconsole-bridge0.4 but it is not installable ros-noetic-gazebo-plugins : Depends: libboost-thread1.71.0 but it is not installable Depends: libgazebo11 (>= 11.15.1) but it is not going to be installed Depends: libopencv-core4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgproc4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libprotobuf17 but it is not installable ros-noetic-gazebo-ros : Depends: libboost-thread1.71.0 but it is not installable Depends: libgazebo11 (>= 11.15.1) but it is not going to be installed Depends: libprotobuf17 but it is not installable ros-noetic-gazebo-ros-control : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libboost-thread1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: libgazebo11 (>= 11.15.1) but it is not going to be installed Depends: libtinyxml2-6a (>= 5.0.0) but it is not installable Depends: ros-noetic-transmission-interface but it is not going to be installed ros-noetic-image-geometry : Depends: libopencv-calib3d4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-core4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgproc4.2 (>= 4.2.0+dfsg) but it is not installable ros-noetic-image-proc : Depends: libconsole-bridge0.4 but it is not installable Depends: libopencv-core4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgproc4.2 (>= 4.2.0+dfsg) but it is not installable ros-noetic-image-publisher : Depends: libconsole-bridge0.4 but it is not installable Depends: libopencv-core4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgcodecs4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-videoio4.2 (>= 4.2.0+dfsg) but it is not installable ros-noetic-image-rotate : Depends: libconsole-bridge0.4 but it is not installable Depends: libopencv-core4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgproc4.2 (>= 4.2.0+dfsg) but it is not installable ros-noetic-image-transport : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: libtinyxml2-6a (>= 5.0.0) but it is not installable ros-noetic-image-view : Depends: libboost-thread1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: libopencv-core4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-highgui4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgcodecs4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-videoio4.2 (>= 4.2.0+dfsg) but it is not installable ros-noetic-interactive-markers : Depends: libboost-thread1.71.0 but it is not installable ros-noetic-joint-state-controller : Depends: libconsole-bridge0.4 but it is not installable ros-noetic-kdl-conversions : Depends: liborocos-kdl1.4 but it is not installable ros-noetic-kdl-parser : Depends: liborocos-kdl1.4 but it is not installable Depends: libtinyxml2-6a (>= 5.0.0) but it is not installable Depends: liburdfdom-model but it is not installable ros-noetic-laser-assembler : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: libtinyxml2-6a (>= 5.0.0) but it is not installable ros-noetic-laser-filters : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: libtinyxml2-6a (>= 5.0.0) but it is not installable ros-noetic-laser-geometry : Depends: libboost-thread1.71.0 but it is not installable ros-noetic-nodelet : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libboost-thread1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: libtinyxml2-6a (>= 5.0.0) but it is not installable ros-noetic-nodelet-tutorial-math : Depends: libconsole-bridge0.4 but it is not installable ros-noetic-pcl-ros : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: libpcl-common1.10 (>= 1.10.0+dfsg) but it is not installable Depends: libpcl-features1.10 (>= 1.10.0+dfsg) but it is not installable Depends: libpcl-filters1.10 (>= 1.10.0+dfsg) but it is not installable Depends: libpcl-io1.10 (>= 1.10.0+dfsg) but it is not installable Depends: libpcl-search1.10 (>= 1.10.0+dfsg) but it is not installable Depends: libpcl-segmentation1.10 (>= 1.10.0+dfsg) but it is not installable Depends: libpcl-surface1.10 (>= 1.10.0+dfsg) but it is not installable ros-noetic-pluginlib : Depends: libboost-filesystem1.71.0 but it is not installable ros-noetic-pluginlib-tutorials : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: libtinyxml2-6a (>= 5.0.0) but it is not installable ros-noetic-position-controllers : Depends: libconsole-bridge0.4 but it is not installable ros-noetic-robot-state-publisher : Depends: liborocos-kdl1.4 but it is not installable Depends: liburdfdom-world but it is not installable ros-noetic-rosbag : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libboost-program-options1.71.0 but it is not installable Depends: libboost-regex1.71.0-icu66 but it is not installable Depends: libboost-thread1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: ros-noetic-rosbag-storage but it is not going to be installed ros-noetic-rosconsole : Depends: libboost-regex1.71.0-icu66 but it is not installable Depends: liblog4cxx10v5 (>= 0.10.0) but it is not installable ros-noetic-rosconsole-bridge : Depends: libconsole-bridge0.4 but it is not installable ros-noetic-roscpp : Depends: libboost-chrono1.71.0 but it is not installable Depends: libboost-filesystem1.71.0 but it is not installable Depends: libboost-thread1.71.0 but it is not installable ros-noetic-roscpp-tutorials : Depends: libboost-thread1.71.0 but it is not installable ros-noetic-rospack : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libboost-program-options1.71.0 but it is not installable Depends: libpython3.8 (>= 3.8.2) but it is not installable Depends: libtinyxml2-6a (>= 5.0.0) but it is not installable ros-noetic-rqt-image-view : Depends: libconsole-bridge0.4 but it is not installable Depends: libopencv-core4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgproc4.2 (>= 4.2.0+dfsg) but it is not installable Depends: ros-noetic-rqt-gui-cpp but it is not going to be installed ros-noetic-rqt-rviz : Depends: libboost-program-options1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: ros-noetic-rqt-gui-cpp but it is not going to be installed ros-noetic-rviz : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libboost-program-options1.71.0 but it is not installable Depends: libboost-thread1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: libtinyxml2-6a (>= 5.0.0) but it is not installable Depends: liburdfdom-world but it is not installable Depends: libyaml-cpp0.6 (>= 0.6.2) but it is not installable ros-noetic-rviz-plugin-tutorials : Depends: libboost-thread1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable ros-noetic-stage-ros : Depends: libboost-thread1.71.0 but it is not installable ros-noetic-stereo-image-proc : Depends: libconsole-bridge0.4 but it is not installable Depends: libopencv-calib3d4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-core4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgproc4.2 (>= 4.2.0+dfsg) but it is not installable ros-noetic-tf : Depends: libboost-thread1.71.0 but it is not installable ros-noetic-tf-conversions : Depends: liborocos-kdl1.4 but it is not installable ros-noetic-tf2 : Depends: libconsole-bridge0.4 but it is not installable ros-noetic-tf2-ros : Depends: libboost-thread1.71.0 but it is not installable Depends: ros-noetic-tf2-py but it is not going to be installed ros-noetic-theora-image-transport : Depends: libconsole-bridge0.4 but it is not installable Depends: libopencv-core4.2 (>= 4.2.0+dfsg) but it is not installable Depends: libopencv-imgproc4.2 (>= 4.2.0+dfsg) but it is not installable ros-noetic-turtle-actionlib : Depends: libboost-thread1.71.0 but it is not installable ros-noetic-urdf : Depends: libboost-filesystem1.71.0 but it is not installable Depends: libconsole-bridge0.4 but it is not installable Depends: libtinyxml2-6a (>= 5.0.0) but it is not installable Depends: liburdfdom-model but it is not installable E: Unable to correct problems, you have held broken packages.我执行到第三步后出现报错,请在此基础上给我能够成功安装ros1的操作步骤
07-23
内容概要:本文详细介绍了一个基于C++的养老院管理系统的设计与实现,旨在应对人口老龄化带来的管理挑战。系统通过整合住户档案、健康监测、护理计划、任务调度等核心功能,构建了从数据采集、清洗、AI风险预测到服务调度与可视化的完整技术架构。采用C++高性能服务端结合消息队列、规则引擎和机器学习模型,实现了健康状态实时监控、智能任务分配、异常告警推送等功能,并解决了多源数据整合、权限安全、老旧硬件兼容等实际问题。系统支持模块化扩展与流程自定义,提升了养老服务效率、医护协同水平和住户安全保障,同时为运营决策提供数据支持。文中还提供了关键模块的代码示例,如健康指数算法、任务调度器和日志记录组件。; 适合人群:具备C++编程基础,从事软件开发或系统设计工作1-3年的研发人员,尤其是关注智慧养老、医疗信息系统开发的技术人员。; 使用场景及目标:①学习如何在真实项目中应用C++构建高性能、可扩展的管理系统;②掌握多源数据整合、实时健康监控、任务调度与权限控制等复杂业务的技术实现方案;③了解AI模型在养老场景中的落地方式及系统架构设计思路。; 阅读建议:此资源不仅包含系统架构与模型描述,还附有核心代码片段,建议结合整体设计逻辑深入理解各模块之间的协同机制,并可通过重构或扩展代码来加深对系统工程实践的掌握。
内容概要:本文详细介绍了一个基于C++的城市交通流量数据可视化分析系统的设计与实现。系统涵盖数据采集与预处理、存储与管理、分析建模、可视化展示、系统集成扩展以及数据安全与隐私保护六大核心模块。通过多源异构数据融合、高效存储检索、实时处理分析、高交互性可视化界面及模块化架构设计,实现了对城市交通流量的实时监控、历史趋势分析与智能决策支持。文中还提供了关键模块的C++代码示例,如数据采集、清洗、CSV读写、流量统计、异常检测及基于SFML的柱状图绘制,增强了系统的可实现性与实用性。; 适合人群:具备C++编程基础,熟悉数据结构与算法,有一定项目开发经验的高校学生、研究人员及从事智能交通系统开发的工程师;适合对大数据处理、可视化技术和智慧城市应用感兴趣的技术人员。; 使用场景及目标:①应用于城市交通管理部门,实现交通流量实时监测与拥堵预警;②为市民出行提供路径优化建议;③支持交通政策制定与信号灯配时优化;④作为智慧城市建设中的智能交通子系统,实现与其他城市系统的数据协同。; 阅读建议:建议结合文中代码示例搭建开发环境进行实践,重点关注多线程数据采集、异常检测算法与可视化实现细节;可进一步扩展机器学习模型用于流量预测,并集成真实交通数据源进行系统验证。
在Python开发过程中,遇到与“scanning”相关的错误通常是指代码解析阶段出现的语法问题,尤其是在处理字符串时容易触发类似 `SyntaxError: EOL while scanning string literal` 的报错。这类错误表明解释器在扫描字符串时遇到了意外的行尾(EOL),即字符串未被正确闭合。 ### 常见原因及解决方案 - **未闭合的引号** Python中的字符串必须由成对的单引号 `'` 或双引号 `"` 包裹。如果遗漏了闭合引号,会导致解释器无法识别字符串边界,从而报错。 **示例错误代码:** ```python message = "Hello, world # 缺少右引号 ``` **修正方式:** ```python message = "Hello, world" ``` - **跨行字符串未使用三重引号** 如果字符串内容跨越多行,必须使用三重引号(`'''` 或 `"""`)来定义;否则,解释器会认为每行结束处为字符串结尾,从而引发错误。 **示例错误代码:** ```python text = "This is a long string that spans multiple lines." # 缺少三重引号 ``` **修正方式:** ```python text = """This is a long string that spans multiple lines.""" ``` - **转义字符使用不当** 若字符串中包含特殊字符(如引号本身),需使用反斜杠 `\` 进行转义。若忘记转义或误用反斜杠,也可能导致字符串扫描失败。 **示例错误代码:** ```python quote = "He said, "Hello!"" # 内部引号未转义 ``` **修正方式:** ```python quote = "He said, \"Hello!\"" ``` - **字符串拼接格式错误** 在拼接多段字符串时,若引号使用不一致或拼接方式错误,也可能造成字符串扫描异常。 **示例错误代码:** ```python result = 'The value is ' + 42 # 数字未转换为字符串 ``` **修正方式:** ```python result = 'The value is ' + str(42) ``` ### 调试建议 1. 定位报错行:查看报错信息中提示的具体代码行,重点关注该行的字符串定义。 2. 检查引号匹配:确保所有字符串都被正确闭合,且左右引号类型一致。 3. 使用IDE辅助:现代编辑器(如 VS Code、PyCharm)能自动高亮字符串范围,有助于快速发现语法错误。 ---
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