1-Write a program in C++ using classes to calculate the ...



1-Write a program in C++ using classes to calculate the area of a circle , a rectangle and a triangle on user’s choice.

#include

#include

class ar

{private:float a;

public:ar()

{a=0;}

~ar()

{a=0;}

void area(float x)

{a=3.4142*x*x;

}

void area(float x,float y)

{a=x*y;

}

void area(float x,float y,int u)

{a=(x*y)/2;

}

void showarea()

{cout ................
................

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