replace

string& replace_all(string& str, const string &old_value, const string &new_value){ while(true) { string::size_type pos(0); if( (pos=str.find(old_value))!=string::npos ) str.replace(pos,old_value.length(),new_value); else break; } return str;}string& replace_all_distinct(string &str, const string &old_value, const string &new_value){ for(string::size_type pos(0); pos!=string::npos; pos+=new_value.length()) { if( (pos=str.find(old_value,pos))!=string::npos ) str.replace(pos,old_value.length(),new_value); else break; } return str;}