编程学习网为您整理以下代码实例，主要实现：C语言库difftime()函数，希望可以帮到各位朋友。
#include <stdio.h>
#include <time.h>
int main () {
time_t start_t, end_t;
double diff_t;
printf("Starting of the program...\n");
time(&start_t);
printf("SleePing for 5 seconds...\n");
sleep(5);
time(&end_t);
diff_t = difftime(end_t, start_t);
printf("Execution time = %f\n", diff_t);
printf("Exiting of the program...\n");
return(0);
}
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