Mega Code Archive
Friend functions can be shared by two or more classes
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#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; }
friend bool sameColor(Cube x, Cylinder y);
};
class Cylinder {
colors color;
public:
Cylinder(colors c) { color= c; }
friend bool sameColor(Cube x, Cylinder y);
};
bool sameColor(Cube x, Cylinder y)
{
if(x.color == y.color)
return true;
else
return false;
}
int main()
{
Cube cube1(red);
Cube cube2(green);
Cylinder cyl(green);
if(sameColor(cube1, cyl))
cout << "cube1 and cyl are the same color.\n";
else
cout << "cube1 and cyl are different colors.\n";
if(sameColor(cube2, 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.
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