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//program to create six functions and call them based on user's choice using switch statement
#include<iostream.h>
#include<conio.h>
void areacircle();
void areasquare();
void arearectangle();
void circumferencecircle();
void perimetersquare();
void perimeterrectangle();
void areacircle()
{
	float radius,area;
	cout<<"enter radius of circle";
	cin>>radius;
	area=3.14*radius*radius;
	cout<<"area of circle is "<<area;
}
void areasquare()
{
	float side,area;
	cout<<"enter side of square";
	cin>>side;
	area=side*side;
	cout<<"area of square is"<<area;
}
void arearectangle()
{
	float length,breadth,area;
	cout<<"enter length of rectangle";
	cin>>length;
	cout<<"enter breadth of rectangle";
	cin>>breadth;
	area=length*breadth;
	cout<<"area of rectangle is "<<area;
}
void circumferencecircle()
{
	float radius,circumference;
	cout<<"enter radius of circle";
	cin>>radius;
	circumference=2*3.14*radius;
	cout<<"circumference of circle is "<<circumference;
}
void perimetersquare()
{
	float side,perimeter;
	cout<<"enter side of square";
	cin>>side;
	perimeter=4*side;
	cout<<"perimeter of square is "<<perimeter;
}
void perimeterrectangle()
{

float length,breadth,perimeter;
	cout<<"enter length of rectangle";
	cin>>length;
	cout<<"enter breadth of rectangle";
	cin>>breadth;
	perimeter=2*(length+breadth);
	cout<<"perimeter of rectangle is "<<perimeter;
}
void main()
{
	int choice;
        clrscr();
	cout<<"1. area of circle\n";
	cout<<"2. area of square\n";
	cout<<"3. area of rectangle\n";
	cout<<"4. circumference of circle\n";
	cout<<"5. perimeter of square\n";
	cout<<"6. perimeter of rectangle\n";
	cout<<"enter your choice 1 to 6";
	cin>>choice;
	switch(choice)
	{
	case 1: areacircle();
		break;
	case 2: areasquare();
		break;
	case 3: arearectangle();
		break;
	case 4: circumferencecircle();
		break;
	case 5: perimetersquare();
		break;
	case 6: perimeterrectangle();
		break;
	default: cout<<"enter a value from 1 to 6";
	}
	getch();
}