/*
 * C program to accept two matrices and find the sum
 * and difference of the matrices
 */
#include <stdio.h>
#include <stdlib.h>

void readmatA();
void printmatA();
void readmatB();
void printmatB();
void sum();
void diff();

int a[10][10], b[10][10], sumarray[10][10], arraydiff[10][10];
int i, j, row1, column1, row2, column2;

void main()
{
    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);
    if (row1 != row2 && column1 != column2)
        {
            printf("Addition and subtraction are possible \n");
            exit(1);
        }
    else
        {
            printf("Enter the elements of matrix A \n");
            readmatA();
            printf("MATRIX A is \n");
            printmatA();
            printf("Enter the elements of matrix B \n");
            readmatB();
            printf("MATRIX B is \n");
            printmatB();
            sum();
            diff();
        }
}
/*  Function to read a matrix A */
void readmatA()
{
    for (i = 0; i < row1; i++)
        {
            for (j = 0; j < column1; j++)
                {
                    scanf("%d", &a[i][j]);
                }
        }
    return;
}
/*  Function to read a matrix B */
void readmatB()
{
    for (i = 0; i < row2; i++)
        {
            for (j = 0; j < column2; j++)
                {
                    scanf("%d", &b[i][j]);
                }
        }
}
/*  Function to print a matrix A */
void printmatA()
{
    for (i = 0; i < row1; i++)
        {
            for (j = 0; j < column1; j++)
                {
                    printf("%3d", a[i][j]);
                }
            printf("\n");
        }
}
/*  Function to print a matrix B */
void printmatB()
{
    for (i = 0; i < row2; i++)
        {
            for (j = 0; j < column2; j++)
                {
                    printf("%3d", b[i][j]);
                }
            printf("\n");
        }
}
/*  Function to do the sum of elements of matrix A and Matrix B */
void sum()
{
    for (i = 0; i < row1; i++)
        {
            for (j = 0; j < column2; j++)
                {
                    sumarray[i][j] = a[i][j] + b[i][j];
                }
        }
    printf("Sum matrix is \n");
    for (i = 0; i < row1; i++)
        {
            for (j = 0; j < column2; j++)
                {
                    printf("%3d", sumarray[i][j]) ;
                }
            printf("\n");
        }
    return;
}
/*  Function to do the difference of elements of matrix A and Matrix B */
void diff()
{
    for (i = 0; i < row1; i++)
        {
            for (j = 0; j < column2; j++)
                {
                    arraydiff[i][j] = a[i][j] - b[i][j];
                }
        }
    printf("Difference matrix is \n");
    for (i = 0; i < row1; i++)
        {
            for (j = 0; j < column2; j++)
                {
                    printf("%3d", arraydiff[i][j]);
                }
            printf("\n");
        }
    return;
}