C program written using switch case statement to calculate the area of ​​geometric figures

Question

Use switch case statements to find the areas of rectangles, squares, triangles, and circles User need to enter base, height, side, radius, breadth and length at runtime to calculate the areas of all geometrical figures.

Solution

The solution to find the areas of rectangle, square, triangle, circle by using the switch case statement is explained below −

Formulae

The formula for finding the areas of the respective geometrical figures are as follows −

• Area of ​​rectangle = breadth *length;
• Area of ​​square = side * side;
• Area of ​​circle = 3.142*radius*radius;
• Area of ​​triangle = 0.5 *base*height;

Example

Following is the C program to find the areas of rectangle, square, triangle, circle by using the switch case statement −

Live Demo

#include <stdio.h>
void main(){
   int fig_code;
   float side, base, length, breadth, height, area, radius;
   printf("-------------------------</p><p>");
   printf(" 1 --> Circle</p><p>");
   printf(" 2 --> Rectangle</p><p>");
   printf(" 3 --> Triangle</p><p>");
   printf(" 4 --> Square</p><p>");
   printf("-------------------------</p><p>");
   printf("Enter the Figure code</p><p>");
   scanf("%d", &fig_code);
   switch(fig_code){
      case 1:
         printf(" Enter the radius</p><p>");
         scanf("%f",&radius);
         area=3.142*radius*radius;
         printf("Area of a circle=%f</p><p>", area);
         break;
      case 2:
         printf(" Enter the breadth and length</p><p>");
         scanf("%f %f",&breadth, &length);
         area=breadth *length;
         printf("Area of a Rectangle=%f</p><p>", area);
         break;
      case 3:
         printf(" Enter the base and height</p><p>");
         scanf("%f %f", &base, &height);
         area=0.5 *base*height;
         printf("Area of a Triangle=%f</p><p>", area);
         break;
      case 4:
         printf(" Enter the side</p><p>");
         scanf("%f", &side);
         area=side * side;
         printf("Area of a Square=%f</p><p>", area);
         break;
      default:
      printf(" Error in figure code</p><p>");
      break;
   }
}

Output

When the above program is executed, it produces the following results −

Run 1:
-------------------------
1 --> Circle
2 --> Rectangle
3 --> Triangle
4 --> Square
-------------------------
Enter the Figure code
3
Enter the base and height
4
7

Area of a Triangle=14.000000

Run 2:
-------------------------
1 --> Circle
2 --> Rectangle
3 --> Triangle
4 --> Square
-------------------------
Enter the Figure code
1
Enter the radius
8
Area of a circle=201.087997

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