C Program to Check if 2 Matrices are Equal

#include < stdio.h>
#include < stdlib.h>
 
void main()
{
    int a[10][10], b[10][10];
    int i, j, row1, column1, row2, column2, flag = 1;
 
    printf("Enter the order of the matrix A \n" );
    scanf("%d %d" , &row1, &column1);
    printf("Enter the order of the matrix B \n" );
    scanf("%d %d" , &row2, &column2);
    printf("Enter the elements of matrix A \n" );
    for (i = 0; i < row1; i++)
    {
        for (j = 0; j < column1; j++)
        {
            scanf("%d" , &a[i][j]);
        }
    }
    printf("Enter the elements of matrix B \n" );
    for (i = 0; i < row2; i++)
    {
        for (j = 0; j < column2; j++)
        {
            scanf("%d" , &b[i][j]);
        }
    }
    printf("MATRIX A is \n" );
    for (i = 0; i < row1; i++)
    {
        for (j = 0; j < column1; j++)
        {
            printf("%3d" , a[i][j]);
        }
        printf("\n" );
    }
    printf("MATRIX B is \n" );
    for (i = 0; i < row2; i++)
    {
        for (j = 0; j < column2; j++)
        {
            printf("%3d" , b[i][j]);
        }
        printf("\n" );
    }
    /*  Comparing two matrices for equality */
    if (row1 == row2 && column1 == column2)
    {
        printf("Matrices can be compared \n" );
        for (i = 0; i < row1; i++)
        {
            for (j = 0; j < column2; j++)
             {
                if (a[i][j] != b[i][j])
                {
                    flag = 0;
                    break;
                }
             }
        }
    }
    else
    {
        printf(" Cannot be compared\n" );
        exit(1);
    }
    if (flag == 1)
        printf("Two matrices are equal \n" );
    else
        printf("But, two matrices are not equal \n" );
}

Output

 Enter the order of the matrix A
 2   2 
Enter the order of the matrix B
 2   2 
Enter the elements of matrix A
 23   56 
 45   80 
Enter the elements of matrix B
 50   26 
 39   78 
MATRIX A is
  23   56 
  45   80 
MATRIX B is
  50   26 
  39   78 
Matrices can be compared
But,two matrices are not equal
 
   
Enter the order of the matrix A
 2   2 
Enter the order of the matrix B
 2   2 
Enter the elements of matrix A
 10   50 
 15   30 
Enter the elements of matrix B
 10   50 
 15   30 
MATRIX A is
  10   50 
  15   30 
MATRIX B is
  10   50 
  15   30 
Matrices can be compared
Two matrices are equal

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