Program No. 8 Input:- #include<iostream.h> #include<conio.h> void main() { clrscr(); int choice,r; float area,perimeter; cout<<"\n circle menu:"; cout<<"\n \n \t 1. Area of circle"; cout<<"\n \t 2. Perimeter of circle"; cout<<"\n \n Enter your choice(1-2) "; cin>>choice; if(choice==1) { cout<<"\n Enter the radius of circle: "; cin>>r; area=3.14*r*r;