c++/c字符串操作汇集

1. 字符串替换

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;

    }

}

2.字符剔除（删除字符串中相同的单个字符）

void char_replace(char *s, char c)

{

    char *m=s;

    char *n=s;

    while(*m)

    {

        if(*m!=c)

            *n++=*m;

        m++;

    }

    *n='\0';

}

3. 字符串分割

void strSplit(const string& strSrc, const string& sep, vector<string>& vectStr)

{

    vectStr.clear();

    std::string s;

    for (std::string::const_iterator Ite = strSrc.begin(); Ite != strSrc.end(); ++Ite)

    {

        if (sep.find(*Ite) != std::string::npos)

        {

            if (s.length()) vectStr.push_back(s);

            s = "";

        }

        else

        {

            s += *Ite;

        }

    }

    if (s.length()) vectStr.push_back(s);

}