C++ 将 char 转换为 const char*

Basically i just want to loop through a string of characters pull each one out and each one has to be of type const char* so i can pass it to a function. heres a example. Thanks for your help.

    string thestring = "abc123";
    const char* theval;
    string result;

    for(i = 0; i < thestring.length(); i++){
        theval = thestring[i]; //somehow convert this must be type const char*
        result = func(theval);
    }

推荐答案

string sym(1, thestring[i]);
theval = sym.c_str();

它为每个字符提供一个以 null 结尾的 const char*.