std::time_t is an STL data type for time.
#include <cstdlib> #include <ctime> #include <iostream> int main() { std::time_t my_time_before; std::time( &my_time_before ); std::system("./Pause"); std::time_t my_time_after; std::time( &my_time_after ); std::cout << std::difftime(my_time_after,my_time_before) << '\n'; }