// test.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include 
     
      #include 
      
       #include 
       
        int _tmain(int argc, _TCHAR* argv[]){    int size = 999999;    TCHAR sCfgFile[MAX_PATH];    DWORD dw_ret = GetModuleFileName(NULL, sCfgFile, MAX_PATH);    time_t start, end ;       time(&start);       for (int i = 0; i < size; ++i)    {        std::wstring path = sCfgFile;        if (0 != dw_ret)        {            size_t pos = path.find_last_of('\\');            if (-1 != pos)            {                path = path.substr(0, pos + 1);            }        }    }    time(&end);      double cost=difftime(end,start);      //wprintf(L"转化成字符串后，获取路径话费时间----%f\n",cost);      printf("转化成字符串后，获取路径话费时间----%f\n",cost);      time_t start1, end1 ;       time(&start1);      int i = 0;    for (int j = 0; j < size; ++j)    {        if (dw_ret > 0)        {            for (i = lstrlen(sCfgFile); sCfgFile[i] != '\\' && i >0; i--);            sCfgFile[i + 1] = '\0';        }    }    time(&end1);      double cost1=difftime(end1,start1);      //wprintf(L"for循环找\字符获取路径----%f\n",cost1);      printf("for循环找字符获取路径----%f\n",cost1);      time_t start2, end2 ;       time(&start2);      for (int i = 0; i < size; ++i)    {    }    time(&end2);      double cost2=difftime(end2,start2);      printf("空循环----%f\n",cost2);     system("pause");    return 0;}
       
      
     

 

这里是unicode编译环境

 

如果是多字节编译的话，可以将 

lstrlen(sCfgFile)换成strlen(sCfgFile), 将sCfgFile的类型换成 char 这里得到的结果是