Operator Overload problem

I recently learned operator overloading from this book I am reading and decided to test it out with some code. I can't find any errors but I get a weird output... I can't really explain. Well here's the code.

Code:

#include <iostream>
using namespace std;

class ints {
      int x, y, z;
   public:
      ints() { x = y = z = 0; }
      ints(int a, int b, int c) { x = a; b = y; z = c; }
      ints operator+(ints op2);
      ints operator=(ints op2);
      void show();
};

ints ints::operator+(ints op2)
{
      ints temp;

      temp.x = x + op2.x;
      temp.y = y + op2.y;
      temp.z = z + op2.z;

      return temp;
}

ints ints::operator=(ints op2)
{
      x = op2.x;
      y = op2.y;
      z = op2.z;

      return *this;
}

void ints::show()
{
      cout << x << ", ";
      cout << y << ", ";
      cout << z << '\n';
}

int main()
{
      ints a(1, 2, 3), b(10, 11, 12), c;

      a.show();
      b.show();
      c = a + b;
      c.show();

      return 0;
}

The output I get is:
1, 2009376667, 3
10, -1, 12
11, 2009376666, 15

The problem isn't in your overloaded operators, it's in your constructor:

Code:

ints(int a, int b, int c) { x = a; b = y; z = c; }

The code in red should be y = b. You're assigning to the parameter, not the class member. You want it the other way around.

gah I knew it would be something simple like that. Thanks man I've been looking at it forever trying to figure out what the heck would cause such a weird error.

>I've been looking at it forever trying to figure out what the heck would cause such a weird error.
If you get strange numbers like that you can be reasonably sure that the problem is an uninitialized variable.