C Program to find area of circle,circumference of circle and volume of sphere.

program 11:Accept  radius from the user write a program having menu driven with the following options and corresponding actions .

1.       Area of circle   : compute area of circle and print.

2.       Circumference of circle  :compute circumference of circle.

3.       Volume of sphere  : compute volume of sphere.

      #include<stdio.h>

       void main()

{

float a,cir,v,r,PI=3.14;

int choice;

printf("\nEnter radius:");

scanf("%f",&r);

printf("\n1:Area of circle");

printf("\n2:Circumference of circle");

printf("\n3:Volume of sphere");

printf("\nEnter your choice:");

scanf("%d",&choice);

switch(choice)

{

    case 1:

    a=PI*r*r;

    printf("\nArea is %f",a);

    break;

    case 2:

    cir=PI*2*r;

    printf("\nCircumference is %f",cir);

    break;

    case 3:

    v=4/3*PI*r*r*r;

    printf("\nVolume is %f",a);

    break;

            default:

            printf("\n invalid");

}

}

 Output

[root@localhost Desktop]# gcc nnn.c

[root@localhost Desktop]# ./a.out

Enter radius: 2

1:Area of circle

2:Circumference of circle

3:Volume of sphere

Enter your choice:1

Area is 12.560000.