C program to subtract two matrices

Write a C program to read elements in two matrices and find the difference of two matrices. Program to subtract two matrices in C.

Example:
If matrix 1:
1 2 3
4 5 6
7 8 9

And matrix 2:
9 8 7
6 5 4
3 2 1

Difference of both matrices =
-8 -6 -4
-2  0  2
 4  6  8

Required knowledge:

Basic C programming, For loop, Array, Matrix

Matrix Subtraction:

Matrix subtraction is a simple and easy process. Elements of two matrices can only be subtracted if and only if both matrices are of same size.

Matrix subtraction is done element wise (entry wise) i.e. Difference of two matrices A and B of size mXn is defined by
(A - B) = Aij - Bij (Where 1 ≤ i ≤ m and 1 ≤ j ≤ n )
3x3 matrix subtraction

Program:

/**
 * C program to find difference of two matrices of size 3x3
 */

#include <stdio.h>

int main()
{
    int A[3][3], B[3][3], C[3][3];
    int row, col;

    /*
     * Reads elements in first matrix
     */
    printf("Enter elements in matrix A of size 3x3: \n");
    for(row=0; row<3; row++)
    {
        for(col=0; col<3; col++)
        {
            scanf("%d", &A[row][col]);
        }
    }

    /*
     * Reads elements in second matrix
     */
    printf("\nEnter elements in matrix B of size 3x3: \n");
    for(row=0; row<3; row++)
    {
        for(col=0; col<3; col++)
        {
            scanf("%d", &B[row][col]);
        }
    }

    /*
     * Subtracts both matrices and stores the result in matrix C
     */
    for(row=0; row<3; row++)
    {
        for(col=0; col<3; col++)
        {
            C[row][col] = A[row][col] - B[row][col];
        }
    }

    /*
     * Prints the difference of both matrices A and B
     */
    printf("\nDifference of two matrices A-B = \n");
    for(row=0; row<3; row++)
    {
        for(col=0; col<3; col++)
        {
            printf("%d ", C[row][col]);
        }
        printf("\n");
    }

    return 0;
} 
Output
X
_
Enter elements in matrix A of size 3x3:
1 2 3
4 5 6
7 8 9

Enter elements in matrix B of size 3x3:
9 8 7
6 5 4
3 2 1

Difference of both matrices A-B =
-8 -6 -4
-2  0  2
 4  6  8

Happy coding ;)


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