C中目前的微秒时间？

#include <stdio.h>
#include <time.h>

int main() {
    clock_t start_time, end_time;
    double elapsed_time;

    start_time = clock();

    // 执行需要计时的代码

    end_time = clock();
    elapsed_time = (double)(end_time - start_time) / CLOCKS_PER_SEC * 1000000;

    printf("程序执行时间：%f 微秒\n", elapsed_time);

    return 0;
}