如何使用C库函数difftime()（代码示例） _difftime

【如何使用C库函数difftime()（代码示例）】C库函数difftime()返回差, 以秒之间起始时间和结束时间。(结束时间开始时间)

//It is present in time.h header file #include Syntax : double difftime(time_t time2, time_t time1); Parameters: time1 : Lower bound of the time interval whose length is calculated. time2 : Higher bound of the time interval whose length is calculated.Return value : Returns the difference between time1 and time2 (as measured in seconds).

//C program to demonstrate working of //difftime() #include < time.h> #include < stdio.h> #include < unistd.h> int main() { int sec; time_t time1, time2; //Current time time (& time1); for (sec = 1; sec < = 6; sec++) sleep(1); //time after sleep in loop. time (& time2); printf ( "Difference is%.2f seconds" , difftime (time2, time1)); return 0; }

输出如下：