usetimer.cpp

来自「C++&datastructure书籍源码,以前外教提供现在与大家共享」· C++ 代码 · 共 31 行

#include <iostream>
using namespace std;

#include "ctimer.h"
#include "prompt.h"

// illustrate CTimer class and loop timings

int main()
{
    int inner = PromptRange("# inner iterations x 10,000 ",1,10000);
    int outer = PromptRange("# outer iterations",1,20);
    
    long j,k;
    CTimer timer;
    
    for(j=0; j < outer; j++)
    {   timer.Start();
        for(k=0; k < inner*10000L; k++)
        {
            // nothing done here
        }
        timer.Stop();
        cout << j << "\t" << timer.ElapsedTime() << endl;
    }
    cout << "-------" << endl;
    cout << "total = " << timer.CumulativeTime() << "\t" 
         << inner*outer*10000L << " iterations "<< endl;
    
    return 0;
}