C Exercises: Addition of two Matrices

Last update on March 18 2025 13:23:51 (UTC/GMT +8 hours)

19. Matrix Addition

Write a program in C for addition of two Matrices of same size.

The task is to write a C program that adds two square matrices of the same size. The program prompts the user to input the size of the matrices (less than 5), elements for each matrix, and then calculates the sum of the matrices. It displays the original matrices and their sum as output.

Visual Presentation:

Sample Solution:

C Code:

#include <stdio.h>

void main() {
    int arr1[50][50], brr1[50][50], crr1[50][50], i, j, n;

    // Prompt user for input
    printf("\n\nAddition of two Matrices :\n");
    printf("------------------------------\n");
    printf("Input the size of the square matrix (less than 5): ");
    scanf("%d", &n);

    // Input elements for the first matrix
    printf("Input elements in the first matrix :\n");
    for (i = 0; i < n; i++) {
        for (j = 0; j < n; j++) {
            printf("element - [%d],[%d] : ", i, j);
            scanf("%d", &arr1[i][j]);
        }
    }

    // Input elements for the second matrix
    printf("Input elements in the second matrix :\n");
    for (i = 0; i < n; i++) {
        for (j = 0; j < n; j++) {
            printf("element - [%d],[%d] : ", i, j);
            scanf("%d", &brr1[i][j]);
        }
    }

    // Display the first matrix
    printf("\nThe First matrix is :\n");
    for (i = 0; i < n; i++) {
        printf("\n");
        for (j = 0; j < n; j++)
            printf("%d\t", arr1[i][j]);
    }

    // Display the second matrix
    printf("\nThe Second matrix is :\n");
    for (i = 0; i < n; i++) {
        printf("\n");
        for (j = 0; j < n; j++)
            printf("%d\t", brr1[i][j]);
    }

    // Calculate the sum of the matrices
    for (i = 0; i < n; i++)
        for (j = 0; j < n; j++)
            crr1[i][j] = arr1[i][j] + brr1[i][j];

    // Display the addition of two matrices
    printf("\nThe Addition of two matrix is : \n");
    for (i = 0; i < n; i++) {
        printf("\n");
        for (j = 0; j < n; j++)
            printf("%d\t", crr1[i][j]);
    }
    printf("\n\n");
}

Sample Output:

Addition of two Matrices :                                                                                    
------------------------------                                                                                
Input the size of the square matrix (less than 5): 2                                                          
Input elements in the first matrix :                                                                          
element - [0],[0] : 1                                                                                         
element - [0],[1] : 2                                                                                         
element - [1],[0] : 3                                                                                         
element - [1],[1] : 4                                                                                         
Input elements in the second matrix :                                                                         
element - [0],[0] : 5                                                                                         
element - [0],[1] : 6                                                                                         
element - [1],[0] : 7                                                                                         
element - [1],[1] : 8                                                                                         
                                                                                                              
The First matrix is :                                                                                         
1       2                                                                                                     
3       4                                                                                                     
The Second matrix is :                                                                                        
5       6                                                                                                     
7       8                                                                                                     
The Addition of two matrix is :                                                                                                                                                      
6       8                                                                                                     
10      12

Flowchart:

For more Practice: Solve these Related Problems:

Write a C program to add two matrices and then subtract the second matrix from the first.
Write a C program to add two matrices and compute the sum of all elements of the resulting matrix.
Write a C program to add two matrices using pointer arithmetic.
Write a C program to add two matrices and then multiply the resulting matrix by a scalar value.

C Programming Code Editor:

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