Question
What is the output of this program?
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#include
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using namespace std;
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class sample
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{
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int width, height;
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public:
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void set_values (int, int);
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int area () {return (width * height);}
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friend sample duplicate (sample);
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};
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void sample::set_values (int a, int b)
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{
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width = a;
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height = b;
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}
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sample duplicate (sample rectparam)
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{
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sample rectres;
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rectres.width = rectparam.width * 2;
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rectres.height = rectparam.height * 2;
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return (rectres);
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}
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int main ()
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{
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sample rect, rectb;
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rect.set_values (2, 3);
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rectb = duplicate (rect);
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cout
Answer: Option C 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
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