Thread: ISO C++ Forbids it!

Program wont compile because of a:

Comparison between pointer and integer

Can this program be saved? Is it badly written? I'm only new, so any help's much appreciated.

( I should probably comment my code - But, sometimes I comment not enough, sometimes I comment too much. On larger programs I comment, but on smaller ones, I think when left un-commented, they look nicer )

Code:

class operate{
      public:
             char oper;
             int w;
             int x;
             int recognize(char opr, int y, int z);
             int add(int y, int z);
             int multiply(int y, int z);
             int divide(int y, int z);
};

int operate::add(int y, int z){
    return y + z;
}

int operate::multiply(int y, int z){
    return y * z;
}

int operate::divide(int y, int z){
    return y / z;
}

int operate::recognize(char opr, int y, int z){
    if ( opr == "+" ){
         return add(y,z);
    }
    else if (opr == "*" ){
         return multiply(y,z);
    }
    else if (opr == "/" ){
         return divide(y,z);
    }
    else {
         return 0;
    }
}

int main(){
    try {
        operate calculator;
        cout << ">>>";
        cin >> calculator.w;
        cout << ">>>";
        cin >> calculator.oper;
        cout << ">>>";
        cin >> calculator.x;
        cout << calculator.recognize(calculator.oper, calculator.w, calculator.x);
    }
    catch (...) {
          cout << "Default error. " << endl;
    }
    system("PAUSE");
}

main() should return a value (but it doesn't have to; 0 is returned implicitly).