fixed.cpp

本文通过一个简单的C++程序示例介绍了如何使用iostream和iomanip库来改变浮点数的输出格式,包括固定小数点形式和科学计数法形式。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

  name="google_ads_frame" marginwidth="0" marginheight="0" src="http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-5572165936844014&dt=1194442938015&lmt=1194190197&format=336x280_as&output=html&correlator=1194442937843&url=file%3A%2F%2F%2FC%3A%2FDocuments%2520and%2520Settings%2Flhh1%2F%E6%A1%8C%E9%9D%A2%2FCLanguage.htm&color_bg=FFFFFF&color_text=000000&color_link=000000&color_url=FFFFFF&color_border=FFFFFF&ad_type=text&ga_vid=583001034.1194442938&ga_sid=1194442938&ga_hid=1942779085&flash=9&u_h=768&u_w=1024&u_ah=740&u_aw=1024&u_cd=32&u_tz=480&u_java=true" frameborder="0" width="336" scrolling="no" height="280" allowtransparency="allowtransparency"> #include <iostream.h>
#include <iomanip.h>

void main(void)
 {
   float value = 0.000123;

   cout << setiosflags(ios::fixed) << value << '/n';
   cout << setiosflags(ios::scientific) << value << '/n';
 }

cmake_minimum_required(VERSION 3.5) project(StudentManagerSystem VERSION 0.1 LANGUAGES CXX) set(CMAKE_AUTOUIC ON) set(CMAKE_AUTOMOC ON) set(CMAKE_AUTORCC ON) set(CMAKE_CXX_STANDARD 17) set(CMAKE_CXX_STANDARD_REQUIRED ON) find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets Sql Charts) find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets Sql Charts) set(PROJECT_SOURCES main.cpp mainwindow.cpp mainwindow.h mainwindow.ui ) if(${QT_VERSION_MAJOR} GREATER_EQUAL 6) qt_add_executable(StudentManagerSystem MANUAL_FINALIZATION ${PROJECT_SOURCES} res.qrc databasemanager.h databasemanager.cpp tabledelegates.h studentinfowidget.cpp studentinfowidget.h studentinfowidget.ui schedulewidget.h schedulewidget.cpp schedulewidget.ui financialwidget.h financialwidget.cpp financialwidget.ui honorwallwidget.h honorwallwidget.cpp honorwallwidget.ui settings.h settings.cpp logindialog.h logindialog.cpp logindialog.ui systemsettingswidget.h systemsettingswidget.cpp systemsettingswidget.ui coze.h coze.cpp coze.ui ) # Define target properties for Android with Qt 6 as: # set_property(TARGET StudentManagerSystem APPEND PROPERTY QT_ANDROID_PACKAGE_SOURCE_DIR # ${CMAKE_CURRENT_SOURCE_DIR}/android) # For more information, see https://doc.qt.io/qt-6/qt-add-executable.html#target-creation else() if(ANDROID) add_library(StudentManagerSystem SHARED ${PROJECT_SOURCES} ) # Define properties for Android with Qt 5 after find_package() calls as: # set(ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android") else() add_executable(StudentManagerSystem ${PROJECT_SOURCES} ) endif() endif() target_link_libraries(StudentManagerSystem PRIVATE Qt${QT_VERSION_MAJOR}::Widgets Qt6::Sql Qt6::Charts) # Qt for iOS sets MACOSX_BUNDLE_GUI_IDENTIFIER automatically since Qt 6.1. # If you are developing for iOS or macOS you should consider setting an # explicit, fixed bundle identifier manually though. if(${QT_VERSION} VERSION_LESS 6.1.0) set(BUNDLE_ID_OPTION MACOSX_BUNDLE_GUI_IDENTIFIER com.example.StudentManagerSystem) endif() set_target_properties(StudentManagerSystem PROPERTIES ${BUNDLE_ID_OPTION} MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION} MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR} MACOSX_BUNDLE TRUE WIN32_EXECUTABLE TRUE ) include(GNUInstallDirs) install(TARGETS StudentManagerSystem BUNDLE DESTINATION . LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} ) if(QT_VERSION_MAJOR EQUAL 6) qt_finalize_executable(StudentManagerSystem) endif() INCLUDE_DIRECTORIES( ${PROJECT_SOURCE_DIR} ) 这是目前的cmakelists.txt文件如果要添加在这个基础上添加
最新发布
06-26
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值