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);
}