What is the output of this program?

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#include
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using namespace std;
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class p
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{
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protected:
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int width, height;
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public:
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void set_values (int a, int b)
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{
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width = a; height = b;
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}
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virtual int area (void) = 0;
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};
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class r: public
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{
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public:
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int area (void)
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{
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return (width * height);
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}
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};
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class t: public p
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{
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public:
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int area (void)
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{
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return (width * height / 2);
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}
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};
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int main ()
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{
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r rect;
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t trgl;
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p * ppoly1 = ▭
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p * ppoly2 = &trgl;
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ppoly1->set_values (4, 5);
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ppoly2->set_values (4, 5);
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cout area() ;
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cout area();
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return 0;
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}