我如何在C中测量时间?

问题描述：

我想知道某个代码块执行了多长时间(大约).像这样:

I want to find out for how long (approximately) some block of code executes. Something like this:

startStopwatch();
// do some calculations
stopStopwatch();
printf("%lf", timeMesuredInSeconds);

怎么样?

答

你可以使用time.h

You can use the clock method in time.h

示例:

clock_t start = clock();
/*Do something*/
clock_t end = clock();
float seconds = (float)(end - start) / CLOCKS_PER_SEC;