Mega Code Archive
A function can be a member of one class and a friend of another
<![CDATA[
#include <iostream>
using namespace std;
class Cylinder; // a forward declaration
enum colors { red, green, yellow };
class Cube {
colors color;
public:
Cube(colors c) { color= c; }
bool sameColor(Cylinder y);
};
class Cylinder {
colors color;
public:
Cylinder(colors c) { color = c; }
friend bool Cube::sameColor(Cylinder y);
};
bool Cube::sameColor(Cylinder y) {
if(color == y.color)
return true;
else
return false;
}
int main()
{
Cube cube1(red);
Cube cube2(green);
Cylinder cyl(green);
if(cube1.sameColor(cyl))
cout << "cube1 and cyl are the same color.\n";
else
cout << "cube1 and cyl are different colors.\n";
if(cube2.sameColor(cyl))
cout << "cube2 and cyl are the same color.\n";
else
cout << "cube2 and cyl are different colors.\n";
return 0;
}
cube1 and cyl are different colors.
cube2 and cyl are the same color.
]]>