C++计算耗时方法（四种方法）

本博客将给出四种在 C++ 中可用于 计算算法耗时 的方法。

#include    // or  #include 
const clock_t begin_time = clock();    
float seconds = float(clock( ) - begin_time) / 1000；    //最小精度到ms

#include 
#include 
using std::chrono::high_resolution_clock;
using std::chrono::milliseconds;

int main()
{
    high_resolution_clock::time_point beginTime = high_resolution_clock::now();
    ...
    high_resolution_clock::time_point endTime = high_resolution_clock::now();
    milliseconds timeInterval = std::chrono::duration_cast(endTime - beginTime);
    std::cout << timeInterval.count() << "msn";
}

#include 
#include      //解决DWORD报错

DWORD start1, end1;      
start1 = GetTickCount();
end1 = GetTickCount(); 

DWORD time = end1 - start1;
cout << "所耗时间为：" << time << "ms" << endl;

#include    //计算时间
using namespace std::chrono;

auto starttime = system_clock::now();
...
duration diff = system_clock::now()- starttime;
cout << "所耗时间为：" << diff.count() << "s" << endl;

彩蛋：
python计算程序耗时：(单位为s)

import time
starttime = time.time()   # 记录当前时间，返回当前时间的时间戳（1970纪元后经过的浮点秒数）
.......
endtime = time.time()
time = endtime - starttime
print(f"所耗时间为{time}s")

------tbc-------
有用可以点个大拇指哦 來