计算算法实际耗时示例程序

#include <iostream>

#include <cstdlib>

#include <ctime>

using namespace std;

int main() {

  clock_t start, finish;

  

  start = clock();

  //你所要测试的代码...

  finish = clock();

  cout << (double)(finish - start) / CLOCKS_PER_SEC << " s" << endl;

  

  return EXIT_SUCCESS;

}