Exercise 1-To demonstrate the use of data types, simple operators and expressions - 4

 4. Accept inner and outer radius of a ring and print the perimeter and area of the ring (Hint:

perimeter = 2 p (a+b) , area = p (a2-b2) )

#include<stdio.h>
#include<conio.h>

void main()
{
 int ir,or;
 float peri,area;
 clrscr();

 printf("\nFinding the perimeter and area of ring:");
 printf("\nEnter the inner radius of ring:");
 scanf("%d",&ir);
 printf("\nEnter the outer radius of ring:");
 scanf("%d",&or);

 peri=2*3.14*(ir*or);
 printf("\nPrimeter of ring:%f",peri);
 area=3.14*((ir*ir)-(or*or));
 printf("\nArea of ring:%f",area);

 getch();
}
/*

Finding the perimeter and area of ring:                                        
Enter the inner radius of ring:15                                              
                                                                               
Enter the outer radius of ring:16                                              
                                                                               
Primeter of ring:1507.199951                                                   
Area of ring:-97.339996                                                        
                                                                               
   */