visual studio 统计程序运行时间

# include "time.h"

void main()
{
    clock_t start_time, end_time;
    start_time = clock();   //获取开始执行时间

    xxxxxxx；    //过程

    end_time = clock();     //获取结束时间
    double Times = (double)(end_time - start_time) / CLOCKS_PER_SEC;
    printf("%f seconds\n", Times);

}

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