Program to Find Area and Circumference of a Circle by using Pointers

Program calculating the Area and Circumference of a Circle
by using Pointers.

#include
main()
{
int radius;
float area, perimeter;
printf("\nEnter radius of a circle:");
scanf ("%d", &radius);
areaperi (radius, &area, &perimeter);
printf("Area=%f", area);
printf("\nPerimeter=%f", perimeter);
}


areaperi(int r, float *a, float *p)
{
*a=3.14*r*r;
*p=2*3.14*r;
}