Friend function
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This document defines two classes, Rectangle and Square, and a function equal() that compares whether a Rectangle and Square object have equal areas. The Rectangle class stores width and height integers, while the Square class stores a side length integer r. Both classes declare equal() as a friend function to allow it access to their private members. The main() function creates Rectangle and Square objects and calls equal() to compare their areas and output "Equal" or "Unequal".
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Friend function
- 1. Friend Function #include<iostream.h> class Square; class Rectangle{ private: int width, height; public: Rectangle(int x, int y){ width=x; height=y; }; friend void equal(Rectangle a, Square b); }; class Square{ private: int r; public: Square(int x){ r=x; }; friend void equal(Rectangle a, Square b); }; void equal(Rectangle a, Square b){ if (a.width*a.height==b.r*b.r) cout << "Equal" << endl; else cout << "Unequal" << endl; } void main(void){ Rectangle a1(20,5); Square b1(10); equal(a1, b1); Rectangle a2(20,10); Square b2(9); equal(a2, b2);
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