C++实现string.replace（字符串替换）

#include "stdafx.h"#include <iostream>#include <string>using namespace std;void string_replace( std::string &strBig, const std::string &strsrc, const std::string &strdst);int _tmain(int argc, _TCHAR* argv[]){    std::string strContent = "This is a Test";    string_replace(strContent, "Test", "demo");    cout << strContent << endl;    system("pause");    return 0;}//************************************// Method:    string_replace// FullName:  string_replace// Access:    public // Returns:   void// Qualifier: 把字符串的strsrc替换成strdst// Parameter: std::string & strBig// Parameter: const std::string & strsrc// Parameter: const std::string & strdst//************************************void string_replace( std::string &strBig, const std::string &strsrc, const std::string &strdst){    std::string::size_type pos = 0;    std::string::size_type srclen = strsrc.size();    std::string::size_type dstlen = strdst.size();    while( (pos=strBig.find(strsrc, pos)) != std::string::npos )    {        strBig.replace( pos, srclen, strdst );        pos += dstlen;    }} 

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