C Program to find the area and circumference of circle

C Program to find the area and circumference of circle 
Answer:
    #include<stdio.h>
    int main()
    {
        float r,a,c;
        printf("Enter radius");
        scanf("%f",&r);
        a=3.14*r*r;
        c=2*3.14*r;
        printf("Area is %0.2f and Circumference is %0.3f",a,c);
        return 0;
    }