本文由博主(YinaPan)原创，转载请注明出处：http://www.cnblogs.com/YinaPan/p/cpp_strcmp.html #include <stdio.h>
#include <tchar.h>
#include <iostream>
#include <string>
#include <Windows.h>using namespace std;
#pragma comment(lib, "winmm.lib")int StringCompare(){string strSource = "hello world!";string strDest = "I am a luck dog!";LARGE_INTEGER m_liPerfFreq = { 0 };QueryPerformanceFrequency(&m_liPerfFreq);LARGE_INTEGER m_liPerfStart = { 0 };QueryPerformanceCounter(&m_liPerfStart);for (int i = 0; i < 1e8; ++i)strSource == strDest;LARGE_INTEGER liPerfNow = { 0 };QueryPerformanceCounter(&liPerfNow);int time = (((liPerfNow.QuadPart - m_liPerfStart.QuadPart) * 1000) / m_liPerfFreq.QuadPart);cout << time << endl;return 0;}int CharCompare(){char str1[100] = "hello world!";char str2[100] = "I am a luck dog!";LARGE_INTEGER m_liPerfFreq = { 0 };QueryPerformanceFrequency(&m_liPerfFreq);LARGE_INTEGER m_liPerfStart = { 0 };QueryPerformanceCounter(&m_liPerfStart);for (int i = 0; i < 1e8; ++i)strcmp(str1, str2);LARGE_INTEGER liPerfNow = { 0 };QueryPerformanceCounter(&liPerfNow);int time = (((liPerfNow.QuadPart - m_liPerfStart.QuadPart) * 1000) / m_liPerfFreq.QuadPart);//单位精确到毫秒，要是不乘以1000则就是秒cout << time << endl;return 0;
}int _tmain(int argc, _TCHAR* argv[]){StringCompare();CharCompare();return 0;
}

#include <stdio.h>
#include <tchar.h>
#include <iostream>
#include <string>
#include <Windows.h>using namespace std;
#pragma comment(lib, "winmm.lib")int StringCompare(){string strSource = "hello world!";string strDest = "I am a luck dog!";LARGE_INTEGER m_liPerfFreq = { 0 };QueryPerformanceFrequency(&m_liPerfFreq);LARGE_INTEGER m_liPerfStart = { 0 };QueryPerformanceCounter(&m_liPerfStart);for (int i = 0; i < 1e8; ++i);//strSource == strDest;
LARGE_INTEGER liPerfNow = { 0 };QueryPerformanceCounter(&liPerfNow);int time = (((liPerfNow.QuadPart - m_liPerfStart.QuadPart) * 1000) / m_liPerfFreq.QuadPart);cout << time << endl;return 0;
}int CharCompare(){char str1[100] = "hello world!";char str2[100] = "I am a luck dog!";LARGE_INTEGER m_liPerfFreq = { 0 };QueryPerformanceFrequency(&m_liPerfFreq);LARGE_INTEGER m_liPerfStart = { 0 };QueryPerformanceCounter(&m_liPerfStart);for (int i = 0; i < 1e8; ++i);//strcmp(str1,str2);
LARGE_INTEGER liPerfNow = { 0 };QueryPerformanceCounter(&liPerfNow);int time = (((liPerfNow.QuadPart - m_liPerfStart.QuadPart) * 1000) / m_liPerfFreq.QuadPart);//单位精确到毫秒，要是不乘以1000则就是秒cout << time << endl;return 0;
}int _tmain(int argc, _TCHAR* argv[]){StringCompare();CharCompare();return 0;
}