Error token

Question

What will be the output of this code?
#include <iostream>
using namespace std;
class Calc{
public:
int a(int x, int y){return x+y;}
int b(int x, int y){return x-y;}
int c(int x, int y){return x*y;}
int d(int x, int y){return x/y;}
};
int main() {
cout<<Calc.c(2,2);

return 0;
}

Answer 1

The output is an instantiation error.

Your code should be something like the following:

#include <iostream>
class Calc {
public:
int a(int x, int y){return x+y;}
int b(int x, int y){return x-y;}
int c(int x, int y){return x*y;}
int d(int x, int y){return x/y;}
};
int main() {
Calc calculate;
std::cout << calculate.c(2,2);
return 0;
}

i.e., you must actually instantiate a Calc object (being calculate).

Answer 2

Edin Hajdarevic you don't get that you can't just say Calc.c() without instantiation of a Calc object?

C++ expects a primary-expression before the '.' token, hence the need for an object.

Answer 3

I don't see why it's an error? I guess the output would be just 4, since 2*2 is 4. And I didn't get what are you talking about, Default