# include < iostream >
using namespace std;
int square(int side)
{
int square;
square=side*side;
return square;
}
int rectangle(int b, int c)
{
int rectangle;
rectangle=b*c;
return rectangle;
}
double circle(double t, double radius)
{
double circle;
//double t=3.14;
circle=t*radius;
return circle;
}
int main()
{
int p;
cout<<"To know the area of the square, press 1"<<endl;
cout<<"To know the area of a rectangle Press 2"<<endl;
cout<<"To know the area of a circle, press 3\n"<<endl;
cout<<"What do you want to calculate: "<<endl;
cin>>p;
if (p==1)
{
int m,n,s=1;
cout<<"Enter the length of one side of the square"<<endl;
cin>>m;
n=square(s);
cout<<"the area of the square is: "<<n<<endl;
return 0;
}
else if (p==2)
{
int r,y,u=1,b,c;
cout<<"Enter the length and width of the rectangle: "<<endl;
cin>>r>>y;
u=rectangle(b,c);
cout<<"the area of the rectangle is: "<<u<<endl;
return 0;
}
else if (p==3)
{
double l, w=1 ,t,radius;
cout<<"enter the radius of the circle: "<<endl;
cin>>l;
w=circle(t,radius);
cout<<"the area of the circle is: "<<w<<endl;
return 0;
}
}
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