What will be the output of the following C++ code? #include <iostream> using namespace std; class sample; class sample1 { int width, height; public: int area () { return (width * height);} void convert (sample a); }; class sample { private: int side; public: void set_side (int a) { side = a; } friend class sample1; }; void sample1::convert (sample a) { width = a.side; height = a.side; } int main () { sample sqr; sample1 rect; sqr.set_side(6); rect.convert(sqr); cout << rect.area(); return 0; }

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