Sum of matrix and its mirror image

Posted on Apr 26, 2020

C program to print sum of matrix and its mirror image.

Program

#include<stdio.h>
#include<conio.h>
#define MAX 10

void read_matrix(int mat[MAX][MAX], int row, int col)
{
    int i, j;
    for(i=0;i<row;i++)
    {
        for(j=0;j<col;j++)
        {
            printf("Element [%d][%d]\t:",i,j);
            scanf("%d",&mat[i][j]);
        }
    }
}

void print_matrix(int mat[MAX][MAX], int row, int col)
{
    int i, j;
    for(i=0;i<row;i++)
    {
        for(j=0;j<col;j++)
        {
            printf("%d\t",mat[i][j]);
        }
        printf("\n");
    }
}

void mirror_image(int mat1[MAX][MAX], int row, int col)
{
    int i, j, k, temp;

    for(i=0;i<row;i++)
    {
        for(j=0,k=col-1;j<k;j++,k--)
        {
            temp = mat1[i][j];
            mat1[i][j] = mat1[i][k];
            mat1[i][k] = temp;
        }
    }
}

void main()
{
    int mat[MAX][MAX], mat1[MAX][MAX];
    int row, col, i, j;

    printf("Enter the number of rows\t:");
    scanf("%d",&row);
    printf("Enter the number of columns\t:");
    scanf("%d",&col);

    printf("Enter the elements of the matrix\n");
    read_matrix(mat, row, col);

    printf("\nMatrix entered is\n");
    print_matrix(mat, row, col);

    for(i=0;i<row;i++)
    {
        for(j=0;j<col;j++)
        {
            mat1[i][j] = mat[i][j];
        }
    }

    mirror_image(mat1, row, col);

    printf("\nMirror image of the matrix is\n");
    print_matrix(mat1, row, col);

    printf("\nSum of the matrix and its mirror image is\n");
    for(i=0;i<row;i++)
    {
        for(j=0;j<col;j++)
        {
            printf("%d\t",mat[i][j] + mat1[i][j]);
        }
        printf("\n");
    }

    getch();
}

Output

Enter the number of rows        :3
Enter the number of columns     :4
Enter the elements of the matrix
Element [0][0]  :1
Element [0][1]  :3
Element [0][2]  :6
Element [0][3]  :9
Element [1][0]  :2
Element [1][1]  :4
Element [1][2]  :5
Element [1][3]  :7
Element [2][0]  :8
Element [2][1]  :10
Element [2][2]  :12
Element [2][3]  :11

Matrix entered is
1       3       6       9
2       4       5       7
8       10      12      11

Mirror image of the matrix is
9       6       3       1
7       5       4       2
11      12      10      8

Sum of the matrix and its mirror image is
10      9       9       10
9       9       9       9
19      22      22      19