C Program to Find the Area of Different Geometrical Shapes

/*
 * C program to find the areas of different geometrical shapes such as
 * circle, square, rectangle etc using switch statements.
 */
#include <stdio.h>
 
void main()
{
    int fig_code;
    float side, base, length, breadth, height, area, radius;
 
    printf("-------------------------\n");
    printf(" 1 --> Circle\n");
    printf(" 2 --> Rectangle\n");
    printf(" 3 --> Triangle\n");
    printf(" 4 --> Square\n");
    printf("-------------------------\n");
    printf("Enter the Figure code\n");
    scanf("%d", &fig_code);
    switch(fig_code)
    {
    case 1:
        printf("Enter the radius\n");
        scanf("%f", &radius);
        area = 3.142 * radius * radius;
        printf("Area of a circle = %f\n", area);
        break;
    case 2:
        printf("Enter the breadth and length\n");
        scanf("%f %f", &breadth, &length);
        area = breadth * length;
        printf("Area of a Reactangle = %f\n", area);
        break;
    case 3:
        printf("Enter the base and height\n");
        scanf("%f %f", &base, &height);
        area = 0.5 * base * height;
        printf("Area of a Triangle = %f\n", area);
        break;
    case 4:
        printf("Enter the side\n");
        scanf("%f", &side);
        area = side * side;
        printf("Area of a Square=%f\n", area);
        break;
    default:
        printf("Error in figure code\n");
        break;
    }
}

Output

-------------------------
 1 --> Circle
 2 --> Rectangle
 3 --> Triangle
 4 --> Square
-------------------------
Enter the Figure code
1
Enter the radius
30
Area of a circle = 2827.800049