⟩ What is the output of this program? #include <iostream> using namespace std; class sample { int width, height; public void set_values (int, int); int area () {return (width * height);} friend sample duplicate (sample); }; void sampleset_values (int a, int b) { width = a; height = b; } sample duplicate (sample rectparam) { sample rectres; rectres.width = rectparam.width * 2; rectres.height = rectparam.height * 2; return (rectres); } int main () { sample rect, rectb; rect.set_values (2, 3); rectb = duplicate (rect); cout << rectb.area(); return 0; } a) 20 b) 16 c) 24
c) 24
Explanation:
In this program, we are using the friend function for duplicate function and calculating the area of the rectangle.
Output:
$ g++ friend1.cpp
$ a.out
24
