C Program to Find Area of Rectangle using Function | Structure

C program to find area of rectangle using function and structure.

In this article, you will learn how to make a C program to find area of rectangle using function and structure.

 

Example

 

You should have knowledge of the following topics in c programming to understand this program:

• C main() function
• C printf() function
• C Function
• C Structure

 

Formula of Area of Rectangle

A = l * w

 

Where

 

In this article, we solve this problem in three methods:

1. Using the normal calculation
2. Using the Function
3. Using the Structure

Source Code

// C Program to Find Area of Rectangle
#include <stdio.h>

int main() {
    float length, width, area;

    printf("Enter the length & width of the rectangle::\n");
    scanf("%f", &length);
    scanf("%f", &width);

    // It will calculate area of rectangle
    area = length * width;

    // It will print the final output
    printf("\nArea of the rectangle is: %f units\n", area);
    return 0;
}

Run Program

Output

 

Explanation

In this given program, we have taken two inputs 5 & 7 length and width of the rectangle from the user via the system console. Then we applied the standard formula to these values to calculate the area.

Then it will return 35.000000 units final output of the above program.

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C Program to Find Area of Rectangle using Function

// C Program to Find Area of Rectangle using Function
#include <stdio.h>

void FindArea(float x, float y) {
    // It will calculate area of rectangle
    float area = x * y;

    // It will print the final output
    printf("\nArea of the rectangle is: %f units\n", area);
}

int main() {
    float length, width;

    printf("Enter the length & width of the rectangle::\n");
    scanf("%f", &length);
    scanf("%f", &width);
    
    FindArea(length, width);
    return 0;
}

Run Program

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C Program to Find Area of Rectangle using Structure

// C Program to Find Area of Rectangle using Structure
#include <stdio.h>

struct Rectangle {
    float length;
    float width;
    float area;
};

int main() {
    // It will declare `Rect` of type `Rectangle`
    struct Rectangle Rect;

    printf("Enter the length & width of the rectangle::\n");
    scanf("%f", &Rect.length);
    scanf("%f", &Rect.width);

    // It will calculate area of rectangle
    Rect.area = Rect.length * Rect.width;

    // It will print the final output
    printf("\nArea of the rectangle is: %f units\n", Rect.area);
    return 0;
}

Run Program

Output

 

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