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c++operator-overloading
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Reputation: 239

Overload double equal operator in struct?

#include <iostream>
using namespace std;

struct coord {
 int x;
 int y;
  bool operator== (const coord &c1) {
   return (x == c1.x && y == c1.y);
  }
};

int main() {
 coord xy1 = {12, 20};
 coord xy2 = {12, 20};
 cout << xy1 == xy2 << endl;
 return 0;
}

I have the code above and the compiler is throwing incomprehensible errors. I can't quite figure out how to overload the == operator in a struct.

Upvotes: 2

Views: 6750

Answers (2)

Fredrick
Fredrick

Reputation: 1310

The function signature should be const:

  bool operator== (const coord &c1) const /* <--- */ {
   return (x == c1.x && y == c1.y);
  }

Upvotes: 0

Mat
Mat

Reputation: 206929

Add a pair of parens:

cout << ( xy1 == xy2 ) << endl;

otherwise this is parsed as:

(cout << xy1) == xy2

Upvotes: 3

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