C program to find Areas of triangle, square,circle,rectangle,parallelogram

C program to find Areas of triangle, square,circle,rectangle,parallelogram

#include<stdio.h>

#include<math.h>

main()

{

int choice;

printf("Enter\n1 for Triangle\n2 for Square\n3 for Circle\n4 for Rectangle\n5 for Parallelogram\n");

scanf("%d",&choice);

switch(choice)

{

 case 1:

 {

  int a,b,c;

        float s,area;

        printf("Enter sides of triangle\n");

        scanf("%d %d %d",&a,&b,&c);

        s=(float)(a+b+c)/2;

        area=(float)(sqrt(s*(s-a)*(s-b)*(s-c)));

        printf("Area of Triangle with sides %d,%d,%d is %f\n",a,b,c,area);

  break;

 }

 case 2:

 {

  float side,area;

  printf("Enter Sides of Square\n");

  scanf("%f",&side);

  area=(float)side*side;

  printf("Area of Square is %f\n",area);

  break;

 }

 case 3:

 {

  float radius,area;

  printf("Enter Radius of Circle\n");

  scanf("%f",&radius);

  area=(float)3.14159*radius*radius;

  printf("Area of Circle with radius %f is %f\n",radius,area);

  break;

 }

 case 4:

 {

  float len,breadth,area;

  printf("Enter Length and Breadth of Rectangle\n");

  scanf("%f %f",&len,&breadth);

  area=(float)len*breadth;

  printf("Area of Rectangle is %f\n",area);

  break;

 }

 case 5:

 {

  float base,height,area;

  printf("Enter base and height of Parallelogram\n");

  scanf("%f %f",&base,&height);

  area=(float)base*height;

  printf("Enter area of Parallelogram is %f\n",area);

  break;

 }

 default:

 {

  printf("Invalid Choice\n");

  break;

 }

}

}

Output:-

Enter

1 for Triangle

2 for Square

3 for Circle

4 for Rectangle

5 for Parallelogram

1

Enter sides of triangle

1

1

1

Area of Triangle with sides 1,1,1 is 0.433013