(C++) GetLastModifiedTime

 

GetLastModifiedTime is a time code snippet to obtain the last time when a file was modified.

 

• Download the Qt Creator project 'GetLastModifiedTime' (zip)

 

Operating system: Ubuntu 10.04 LTS Lucid Lynx

IDE: Qt Creator 2.0.0

Project type: GUI application

Compiler: G++ 4.4.1

Libraries used:

• Boost: version 1.40
• Qt: version 4.7.0 (32 bit)

 

 

 

 

 

Qt project file

 

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#------------------------------------------------- # # Project created by QtCreator 2010-09-28T13:57:09 # #------------------------------------------------- QT       += core QT       -= gui LIBS += -L/usr/lib -lboost_system LIBS += -L/usr/lib -lboost_filesystem TARGET = CppGetLastWriteTime CONFIG   += console CONFIG   -= app_bundle TEMPLATE = app SOURCES += main.cpp

 

 

 

 

 

main.cpp

 

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#include <cassert> #include <ctime> #include <iostream> #include <boost/filesystem.hpp> #include <boost/lexical_cast.hpp> ///TimeToStr converts std::time_t to std::string. ///From http://www.richelbilderbeek.nl/CppTimeToStr.htm const std::string TimeToStr(const std::time_t& time) {   return std::ctime( &time); } ///GetLastModifiedTime returns the last time when a file is modified. ///From http://www.richelbilderbeek.nl/CppGetLastModifiedTime.htm const std::time_t GetLastModifiedTime(const std::string& filename) {   assert(boost::filesystem::exists(filename));   return boost::filesystem::last_write_time(filename); } int main(int, char* argv[]) {   const std::string filename = argv[0];   const std::string s = TimeToStr(GetLastModifiedTime(filename));   std::cout << s << '\n'; }

 

Screen output:

 

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Tue Sep 28 14:20:38 2010