Question

#include <iostream>

class myFunctorClass
{
public:
    myFunctorClass(int x) : _x(x) {}
    int oprator() (int y) {return _x + y;}
private:
    int _x;
}

int main(void)
   {
       myFunctorClass addFive(5);
       std::cout << addFive(6);
       std::cin.get();
       return 0;
   }

This is example code from here:
http://www.cprogramming.com/tutorial/functors-function-objects-in-c++.html

But I got errors:

Error   5   error C2065: 'y' : undeclared identifier

and

Error   2   error C2628: 'myFunctorClass' followed by 'int' is illegal (did you forget a ';'?)  

I don’t have gcc now. Is this supposed to be compile under gcc or linux environment?
How to change it work in Visual Studio?

Update:
Problem solved.
I mis-spell operator
I lost one semicolon.

Thank you.

Answer 1

There are at least two problems here — in C++, unlike C# / Java, etc., you need a semicolon after your class declaration. The other issue is that you have misspelled “operator.”