Using Macros Find Area and Perimeter of Triangle, Square, Circle: C Program

Problem State: Write macro definitions with arguments for calculation of area and perimeter of a triangle, a square and a circle.

Store these macro definitions in a file called “areaperi.h”. Include this file in your program, and call the macro definitions for calculating area and perimeter for different squares, triangles and circles.

Page Contents

Problem Statement Analysis

1. We need to write macro definitions which accept arguments.
2. We need to write macro definitions to calculate area and perimeter of triangle, square and circle.
3. We need to write macro definition inside a separate file called areaperi.h and then include this header file into our source file and make use of the macro definitions to calculate area and perimeter of Triangle, Square and Circle for various user inputs.

Video Tutorial: Using Macros Find Area and Perimeter of Triangle, Square, Circle: C Program

[youtube https://www.youtube.com/watch?v=lR50ONlpDNw]

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Source Code: Using Macros Find Area and Perimeter of Triangle, Square, Circle: C Program

areaperi.h

#include<math.h>

#define TRI_PERI(a, b, c) (a + b + c)
#define SP(a, b, c) ( (a + b + c) / 2.0 )
#define TRI_AREA(a, b, c) ( sqrt( SP(a,b,c) * \
                                 ( SP(a,b,c) - a ) *\
                                  (SP(a,b,c) - b) * \
                                  (SP(a,b,c) - c)) )

#define SQR_PERI(s) (4 * s)
#define SQR_AREA(s) (s * s)

#define C_PERI(r) (2 * M_PI * r)
#define C_AREA(r) (M_PI * r * r)

main.c

#include<stdio.h>
#include "areaperi.h"

int main()
{
    float a, b, c, side, radius;
    int choice, repeat;

    do
    {
        printf("1. Area of Triangle\n");
        printf("2. Perimeter of Triangle\n");
        printf("3. Area of Square\n");
        printf("4. Perimeter of Square\n");
        printf("5. Area of Circle\n");
        printf("6. Perimeter of Circle\n");

        printf("\nEnter your choice\n");
        scanf("%d", &choice);

        switch(choice)
        {
            case 1: printf("Enter 3 sides of a Triangle\n");
                    scanf("%f%f%f", &a, &b, &c);
                    printf("Area of Trianlge is %0.2f\n", TRI_AREA(a,b,c));
                    break;
            case 2: printf("Enter 3 sides of a Triangle\n");
                    scanf("%f%f%f", &a, &b, &c);
                    printf("Perimeter of Trianlge is %0.2f\n", TRI_PERI(a,b,c));
                    break;
            case 3: printf("Enter length of side of Square\n");
                    scanf("%f", &side);
                    printf("Area of Square is %0.2f", SQR_AREA(side));
                    break;
            case 4: printf("Enter length of side of Square\n");
                    scanf("%f", &side);
                    printf("Perimeter of Square is %0.2f", SQR_PERI(side));
                    break;
            case 5: printf("Enter Radius of Circle\n");
                    scanf("%f", &radius);
                    printf("Area of Circle is %0.2f\n", C_AREA(radius));
                    break;
            case 6: printf("Enter Radius of Circle\n");
                    scanf("%f", &radius);
                    printf("Circumference of Circle is %0.2f\n", C_PERI(radius));
                    break;
            default: printf("\nPlease enter valid choice\n");
        }

        printf("\n\nDo you want to continue? Ans: 0 or 1\n");
        scanf("%d", &repeat);

        printf("\n");

    }while(repeat);

    return 0;
}

Output:
1. Area of Triangle
2. Perimeter of Triangle
3. Area of Square
4. Perimeter of Square
5. Area of Circle
6. Perimeter of Circle

Enter your choice
1
Enter 3 sides of a Triangle
5
6
9
Area of Trianlge is 14.14

Do you want to continue? Ans: 0 or 1
1