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//program to create two functions to calculate area and perimeter of rectangle and call them based on user choice using switch statement #include<stdio.h> #include<conio.h> void area(int,int); void perimeter(int,int); void area(int length,int breadth) { int area; area=length*breadth; printf("area of rectangle is %d",area); } void perimeter(int length,int breadth) { int perimeter; perimeter=2*(length+breadth); printf("perimeter of rectangle is %d",perimeter); } void main() { int ch; int l,b; clrscr(); printf("enter length of rectangle"); scanf("%d",&l); printf("enter breadth of rectangle"); scanf("%d",&b); printf("enter your choice 1 for area or 2 for perimeter"); scanf("%d",&ch); switch(ch) { case 1: area(l,b); break; case 2: perimeter(l,b); break; default: printf("enter a valid choice 1 for area or 2 for perimeter"); } getch(); }