Area Of Circle / Circumference

#include<stdio.h>   int main() {      int rad;    float PI = 3.14, area, ci;      printf("\nEnter radius of circle: ");    scanf("%d", &rad);      area = PI * rad * rad;    printf("\nArea of circle : %f ", area);      ci = 2 * PI * rad;    printf("\nCircumference : %f ", ci);      return (0); }

OUTPUT

Enter radius of circle: 3

Area of circle : 28.260000
Circumference : 18.840000