1408051110-hd-Big Number.cpp

本文介绍了一种通过计算对数来确定N!位数的方法。利用log10(N!)并借助log10(a*b)=log10(a)+log10(b)的性质,文章提供了一个C语言程序实现,该程序能够接收用户输入的整数N,并输出N!的位数。
/*要求 N!的位数 ,可以用 log10(N!)
  又因为  log10(a*b)=log10(a)+log10(b)  */
#include<stdio.h>
#include<math.h>
int main()
{
 int t,n;
 int i;
 double sum;
 scanf("%d",&t);
 while(t--)
 {
  scanf("%d",&n);
  sum=0;
  for(i=1;i<=n;i++)
      sum+=log10(i*1.0);
  /* log函数应用
     1、函数 log是以 e为底的,log10是以 10为底的
     2、double log10(double x)
        即要求所求数为 double型,而且他的返回值也为double型   */
  printf("%d\n",(int)sum+1);
 }
 return 0;
}
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libraries/wlan/wlan_module/wlan_mode_switch.o libraries/wlan/wlan_module/utils.o libraries/wlan/wlan_module/soft_ap.o libraries/wlan/wlan_module/wlan_cascade.o libraries/wlan/wlan_module/cmd.o libraries/wlan/wlan_module/wlan_common.o libraries/wlan/wlan_module/wlan_manager.o libraries/wlan/libwlan_adapter/wlan_region.o libraries/wlan/libwlan_adapter/wlan_adapter.o libraries/wlan/libwlan_adapter/wlan_hostapd.o libraries/wlan/libwlan_adapter/wlan_utils.o libraries/wlan/libwlan_adapter/wlan_adapter_rtl.o libraries/wlan/libwlan_adapter/wlan_script.o libraries/wlan/libwlan_adapter/wlan_wpa_supplicant.o libraries/wlan/libwlan_adapter/wlan_adapter_wq.o libraries/debug_tools/debug_tools/debug_tools_data_model.o libraries/debug_tools/debug_tools/debug_tools.o libraries/debug_tools/debug_tools/coredump.o libraries/libs/libesp32/esp32_insmod.o libraries/libs/libncnn/flatten.cpp.o libraries/libs/libncnn/blob.cpp.o libraries/libs/libncnn/simplestl.cpp.o libraries/libs/libncnn/convolution_mips.cpp.o libraries/libs/libncnn/cumulativesum.cpp.o libraries/libs/libncnn/pipelinecache.cpp.o libraries/libs/libncnn/mat_pixel_affine.cpp.o libraries/libs/libncnn/mat_pixel.cpp.o libraries/libs/libncnn/pipeline.cpp.o libraries/libs/libncnn/paramdict.cpp.o libraries/libs/libncnn/copyto.cpp.o libraries/libs/libncnn/net.cpp.o libraries/libs/libncnn/mat_pixel_drawing.cpp.o libraries/libs/libncnn/mat_pixel_rotate.cpp.o libraries/libs/libncnn/innerproduct_mips.cpp.o libraries/libs/libncnn/mat.cpp.o libraries/libs/libncnn/layer.cpp.o libraries/libs/libncnn/benchmark.cpp.o libraries/libs/libncnn/modelbin.cpp.o libraries/libs/libncnn/flatten_mips.cpp.o libraries/libs/libncnn/pooling_mips.cpp.o libraries/libs/libncnn/allocator.cpp.o libraries/libs/libncnn/datareader.cpp.o libraries/libs/libncnn/innerproduct.cpp.o libraries/libs/libncnn/relu_mips.cpp.o libraries/libs/libncnn/pooling.cpp.o libraries/libs/libncnn/simpleomp.cpp.o libraries/libs/libncnn/convolution.cpp.o libraries/libs/libncnn/input.cpp.o libraries/libs/libncnn/simpleocv.cpp.o libraries/libs/libncnn/mat_pixel_resize.cpp.o libraries/libs/libncnn/command.cpp.o libraries/libs/libncnn/cpu.cpp.o libraries/libs/libncnn/option.cpp.o libraries/libs/libncnn/gpu.cpp.o libraries/libs/libncnn/padding.cpp.o libraries/libs/libncnn/padding_mips.cpp.o libraries/libs/libncnn/relu.cpp.o libraries/libs/libncnn/c_api.cpp.o libraries/libs/libmediautil/tpmd5.o libraries/libs/libmediautil/h265parse.o libraries/libs/libmediautil/avbasicop.o libraries/libs/libmediautil/mbasicop.o libraries/libs/libmediautil/bitstream.o libraries/libs/libmediautil/h264parse.o libraries/libs/libmediautil/basicutil.o libraries/libs/libmediautil/mbuffer.o libraries/libs/libdetectcaps/detect_capability.o libraries/libs/libavdc/libavdc.o libraries/libs/libavdc/aec.o libraries/libs/libavdc/mpp_adapter.o libraries/libs/libavdc/audio.o libraries/libs/libavdc/rmem_calc.o libraries/libs/libavdc/video.o libraries/libs/libavdc/video_api.o libraries/libs/libavdc/aeawb.o libraries/libs/libaudio/samplerate.o libraries/libs/libaudio/audio_utils.o libraries/libs/libcamera/libimage.o libraries/libs/libcamera/libosd.o libraries/libs/libcamera/camera_sar_adc.o libraries/libs/libcamera/camera_cover.o libraries/libs/libcamera/libcover.o libraries/libs/libcamera/libadc.o libraries/libs/libcamera/camera_gpio.o libraries/libs/libcamera/libcamera.o libraries/libs/libcamera/camera_osd.o libraries/libs/libcamera/camera_image.o libraries/libs/libcamera/tpcam_osd.o libraries/libs/libopenapi/fast_openapi_api.o libraries/libs/libopenapi/lib_openapi.o libraries/libs/libmotor/spi_motor_worker.o libraries/libs/libmotor/spi_motor.o libraries/libs/libds/ds_module_ctrl.o libraries/libs/libds/ds_trans_rule.o libraries/libs/libds/ds_blob_data.o libraries/libs/libds/ds_module.o libraries/libs/libds/ds_trans_ctrl.o libraries/libs/libds/ds_slp_parser.o libraries/libs/libds/ds_convert.o libraries/libs/libds/ds_model.o libraries/libs/libds/ds_flash.o libraries/libs/libds/ds_diag.o libraries/libs/libspeaker/libspeaker.o libraries/libs/libspeaker/speaker.o libraries/libs/libsmartdata/smart_data_format.o libraries/libs/libsdm/smart_data.o libraries/libs/libsdm/property.o libraries/libs/libsdm/system.o libraries/libs/libsdm/audio.o libraries/libs/libsdm/permission.o libraries/libs/libjpeg_stream/libjpeg_stream.o libraries/libs/libpwr/pwr.o libraries/libs/libflashio/flashio.o libraries/libs/libtpssl/commonssl.o libraries/libs/libtpssl/tcpApi.o libraries/libs/libtpssl/sslApi.o libraries/libs/libz/deflate.o libraries/libs/libz/adler32.o libraries/libs/libz/gzclose.o libraries/libs/libz/gzread.o libraries/libs/libz/gzwrite.o libraries/libs/libz/zutil.o libraries/libs/libz/inftrees.o libraries/libs/libz/crc32.o libraries/libs/libz/inflate.o libraries/libs/libz/inffast.o libraries/libs/libz/uncompr.o libraries/libs/libz/compress.o libraries/libs/libz/trees.o libraries/libs/libz/infback.o libraries/libs/libz/gzlib.o -Lstaging_dir/target-mips-openwrt-linux-uclibc-c200v5/usr/lib -Lstaging_dir/target-mips-openwrt-linux-uclibc-c200v5/lib -L../sdk/soc/T23/toolchain/mips-gcc540-glibc222-64bit-r3.3.0.smaller/mips-linux-gnu/libc/uclibc/usr/lib -L../sdk/soc/T23/toolchain/mips-gcc540-glibc222-64bit-r3.3.0.smaller/mips-linux-gnu/libc/uclibc/lib -Lstaging_dir/target-mips-openwrt-linux-uclibc-c200v5/usr/lib/libiconv-full/lib -Lstaging_dir/target-mips-openwrt-linux-uclibc-c200v5/usr/lib/libintl-full/lib -Wl,--gc-sections -lidleworker -ldms_tool -ldms -lutils -lmbedtls -lmbedx509 -lmbedcrypto -ljson -lpthread -lm -ludt -ltptimer -ldl -lrt -lwpactrl -Lstaging_dir/target-mips-openwrt-linux-uclibc-c200v5/usr/lib/mpp/ -limp -lsysutils -lalog -laudioProcess -Wl,-rpath-link=staging_dir/target-mips-openwrt-linux-uclibc-c200v5/usr/lib" libraries/avts/p2p/stun.o: In function `stunParseHostName': /home/linzihao/Code/onvif1/NVMP/nvmp/build_dir/target-mips-openwrt-linux-uclibc-c200v5/avts/streams/p2p/stun.c:1198: warning: gethostbyname is obsolescent, use getnameinfo() instead. libraries/nsd/onvif/onvif_srv.o: In function `check_digest_auth': /home/linzihao/Code/onvif1/NVMP/nvmp/build_dir/target-mips-openwrt-linux-uclibc-c200v5/nsd/modules/onvif/onvif_server/onvif_srv.c:549: undefined reference to `get_timestamp1' /home/linzihao/Code/onvif1/NVMP/nvmp/build_dir/target-mips-openwrt-linux-uclibc-c200v5/nsd/modules/onvif/onvif_server/onvif_srv.c:576: undefined reference to `get_timestamp1' libraries/nsd/onvif/onvif_srv.o: In function `onvif_proc_data_srv': /home/linzihao/Code/onvif1/NVMP/nvmp/build_dir/target-mips-openwrt-linux-uclibc-c200v5/nsd/modules/onvif/onvif_server/onvif_srv.c:604: undefined reference to `get_timestamp1' /home/linzihao/Code/onvif1/NVMP/nvmp/build_dir/target-mips-openwrt-linux-uclibc-c200v5/nsd/modules/onvif/onvif_server/onvif_srv.c:612: undefined reference to `get_timestamp1' collect2: error: ld returned 1 exit status _这个报错什么意思
11-25
基于可靠性评估序贯蒙特卡洛模拟法的配电网可靠性评估研究(Matlab代码实现)内容概要:本文围绕“基于可靠性评估序贯蒙特卡洛模拟法的配电网可靠性评估研究”,介绍了利用Matlab代码实现配电网可靠性的仿真分析方法。重点采用序贯蒙特卡洛模拟法对配电网进行长时间段的状态抽样与统计,通过模拟系统元件的故障与修复过程,评估配电网的关键可靠性指标,如系统停电频率、停电持续时间、负荷点可靠性等。该方法能够有效处理复杂网络结构与设备时序特性,提升评估精度,适用于含分布式电源、电动汽车等新型负荷接入的现代配电网。文中提供了完整的Matlab实现代码与案例分析,便于复现和扩展应用。; 适合人群:具备电力系统基础知识和Matlab编程能力的高校研究生、科研人员及电力行业技术人员,尤其适合从事配电网规划、运行与可靠性分析相关工作的人员; 使用场景及目标:①掌握序贯蒙特卡洛模拟法在电力系统可靠性评估中的基本原理与实现流程;②学习如何通过Matlab构建配电网仿真模型并进行状态转移模拟;③应用于含新能源接入的复杂配电网可靠性定量评估与优化设计; 阅读建议:建议结合文中提供的Matlab代码逐段调试运行,理解状态抽样、故障判断、修复逻辑及指标统计的具体实现方式,同时可扩展至不同网络结构或加入更多不确定性因素进行深化研究。
两个容器都挂掉了,node1的日志最后一段如下 INFO [main] 2025-08-29 09:49:59,843 StorageService.java:3281 - Node /172.18.0.2:7000 state jump to NORMAL INFO [main] 2025-08-29 09:49:59,844 Gossiper.java:2443 - Waiting for gossip to settle... INFO [main] 2025-08-29 09:50:07,845 Gossiper.java:2474 - No gossip backlog; proceeding INFO [main] 2025-08-29 09:50:07,867 CassandraDaemon.java:450 - Prewarming of auth caches is disabled INFO [CompactionExecutor:1] 2025-08-29 09:50:07,872 CompactionTask.java:167 - Compacting (8bdcbcb0-84bd-11f0-b3a1-d3927c21a65e) [/var/lib/cassandra/data/system/local-7ad54392bcdd35a684174e047860b377/nb-7-big-Data.db:level=0, /var/lib/cassandra/data/system/local-7ad54392bcdd35a684174e047860b377/nb-5-big-Data.db:level=0, /var/lib/cassandra/data/system/local-7ad54392bcdd35a684174e047860b377/nb-6-big-Data.db:level=0, /var/lib/cassandra/data/system/local-7ad54392bcdd35a684174e047860b377/nb-3-big-Data.db:level=0, /var/lib/cassandra/data/system/local-7ad54392bcdd35a684174e047860b377/nb-4-big-Data.db:level=0, /var/lib/cassandra/data/system/local-7ad54392bcdd35a684174e047860b377/nb-1-big-Data.db:level=0, /var/lib/cassandra/data/system/local-7ad54392bcdd35a684174e047860b377/nb-2-big-Data.db:level=0, ] INFO [main] 2025-08-29 09:50:07,874 NativeTransportService.java:132 - Using Netty Version: [netty-all=netty-all-4.1.119.Final.fb7c786f2d, netty-buffer=netty-buffer-4.1.119.Final.fb7c786f2d, netty-codec=netty-codec-4.1.119.Final.fb7c786f2d, netty-common=netty-common-4.1.119.Final.fb7c786f2d, netty-handler=netty-handler-4.1.119.Final.fb7c786f2d, netty-handler-proxy=netty-handler-proxy-4.1.119.Final.fb7c786 (repository: dirty), netty-handler-ssl-ocsp=netty-handler-ssl-ocsp-4.1.119.Final.fb7c786 (repository: dirty), netty-resolver=netty-resolver-4.1.119.Final.fb7c786f2d, netty-transport=netty-transport-4.1.119.Final.fb7c786f2d, netty-transport-classes-epoll=netty-transport-classes-epoll-4.1.119.Final.fb7c786 (repository: dirty), netty-transport-classes-kqueue=netty-transport-classes-kqueue-4.1.119.Final.fb7c786f2d, netty-transport-native-epoll=netty-transport-native-epoll-4.1.119.Final.fb7c786 (repository: dirty), netty-transport-native-unix-common=netty-transport-native-unix-common-4.1.119.Final.fb7c786f2d] INFO [main] 2025-08-29 09:50:07,875 NativeTransportService.java:70 - Netty using native Epoll event loop INFO [main] 2025-08-29 09:50:07,894 PipelineConfigurator.java:147 - Using Netty Version: [netty-all=netty-all-4.1.119.Final.fb7c786f2d, netty-buffer=netty-buffer-4.1.119.Final.fb7c786f2d, netty-codec=netty-codec-4.1.119.Final.fb7c786f2d, netty-common=netty-common-4.1.119.Final.fb7c786f2d, netty-handler=netty-handler-4.1.119.Final.fb7c786f2d, netty-handler-proxy=netty-handler-proxy-4.1.119.Final.fb7c786 (repository: dirty), netty-handler-ssl-ocsp=netty-handler-ssl-ocsp-4.1.119.Final.fb7c786 (repository: dirty), netty-resolver=netty-resolver-4.1.119.Final.fb7c786f2d, netty-transport=netty-transport-4.1.119.Final.fb7c786f2d, netty-transport-classes-epoll=netty-transport-classes-epoll-4.1.119.Final.fb7c786 (repository: dirty), netty-transport-classes-kqueue=netty-transport-classes-kqueue-4.1.119.Final.fb7c786f2d, netty-transport-native-epoll=netty-transport-native-epoll-4.1.119.Final.fb7c786 (repository: dirty), netty-transport-native-unix-common=netty-transport-native-unix-common-4.1.119.Final.fb7c786f2d] INFO [main] 2025-08-29 09:50:07,894 PipelineConfigurator.java:148 - Starting listening for CQL clients on /0.0.0.0:9042 (unencrypted)... INFO [main] 2025-08-29 09:50:07,896 CassandraDaemon.java:744 - Startup complete INFO [CompactionExecutor:1] 2025-08-29 09:50:07,909 CompactionTask.java:258 - Compacted (8bdcbcb0-84bd-11f0-b3a1-d3927c21a65e) 7 sstables to [/opt/cassandra/data/data/system/local-7ad54392bcdd35a684174e047860b377/nb-8-big,] to level=0. 849B to 657B (~77% of original) in 34ms. Read Throughput = 23.897KiB/s, Write Throughput = 18.492KiB/s, Row Throughput = ~2/s. 7 total partitions merged to 1. Partition merge counts were {7:1, }. Time spent writing keys = 20ms INFO [NonPeriodicTasks:1] 2025-08-29 09:50:07,913 BigFormat.java:231 - Deleting sstable: /opt/cassandra/data/data/system/local-7ad54392bcdd35a684174e047860b377/nb-7-big INFO [NonPeriodicTasks:1] 2025-08-29 09:50:07,914 BigFormat.java:231 - Deleting sstable: /opt/cassandra/data/data/system/local-7ad54392bcdd35a684174e047860b377/nb-5-big INFO [NonPeriodicTasks:1] 2025-08-29 09:50:07,917 BigFormat.java:231 - Deleting sstable: /opt/cassandra/data/data/system/local-7ad54392bcdd35a684174e047860b377/nb-6-big INFO [NonPeriodicTasks:1] 2025-08-29 09:50:07,919 BigFormat.java:231 - Deleting sstable: /opt/cassandra/data/data/system/local-7ad54392bcdd35a684174e047860b377/nb-3-big INFO [NonPeriodicTasks:1] 2025-08-29 09:50:07,920 BigFormat.java:231 - Deleting sstable: /opt/cassandra/data/data/system/local-7ad54392bcdd35a684174e047860b377/nb-4-big INFO [NonPeriodicTasks:1] 2025-08-29 09:50:07,922 BigFormat.java:231 - Deleting sstable: /opt/cassandra/data/data/system/local-7ad54392bcdd35a684174e047860b377/nb-1-big INFO [NonPeriodicTasks:1] 2025-08-29 09:50:07,924 BigFormat.java:231 - Deleting sstable: /opt/cassandra/data/data/system/local-7ad54392bcdd35a684174e047860b377/nb-2-big INFO [OptionalTasks:1] 2025-08-29 09:50:17,934 CassandraRoleManager.java:429 - Created default superuser role 'cassandra'
08-30
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