【C++Q】

//c_str
const char* str2Cchar(string s){
    //const char* ss = s.c_str();  //出错，因为s会被析构，ss指向垃圾内容
    char c[20];
    strcpy_s(c, s.c_str());

    return c;
}

//atoi
int Cchar2int(const char* s){
    //char buffer[100];
    int n = atoi(s);
    return n;
}

int _tmain(int argc, _TCHAR* argv[])
{
    //string s = "123455";
    //const char* ss = str2Cchar(s);

    char s[] = "123455";
    const char* ss = s;

    cout << Cchar2int(ss) << endl;

    return 0;
}