Compute the Product of Two Matrices

           #include

#include

#define maxrows 10

#define maxcols 10

void readmatrix(int arr[][maxcols], int m, int n);

void printmatrix(int arr[][maxcols], int m, int n);

void productmatrix(int array1[][maxcols], int array2[][maxcols],

int array3[][maxcols], int m, int n);

void main()

    int array1[maxrows][maxcols], array2[maxrows][maxcols],

    array3[maxrows][maxcols];

    int m, n;

    printf("Enter the value of m and n \n");

    scanf("%d %d", &m, &n);

    printf("Enter Matrix array1 \n");

    readMatrix(array1, m, n);

    printf("Matrix array1 \n");

    printMatrix(array1, m, n);

    printf("Enter Matrix array2 \n");

    readMatrix(array2, m, n);

    printf("Matrix B \n");

    printMatrix(array2, m, n);

    productMatrix(array1, array2, array3, m, n);

    printf("The product matrix is \n");

    printMatrix(array3, m, n);

void readMatrix(int arr[][maxcols], int m, int n)

    int i, j;

    for (i = 0; i < m; i++)

        for (j = 0; j < n; j++)

            scanf("%d", &arr[i][j]);

void printMatrix(int arr[][maxcols], int m, int n)

    int i, j;

    for (i = 0; i < m; i++)

        for (j = 0; j < n; j++)

            printf("%3d", arr[i][j]);

        printf("\n");

void productMatrix(int array1[][maxcols], int array2[][maxcols],

int array3[][maxcols], int m, int n)

    int i, j, k;

    for (i = 0; i < m; i++)

        for (j = 0; j < n; j++)

            array3[i][j] = 0;

            for (k = 0; k < n; k++)

                        array3[i][j] = array3[i][j] + array1[i][k] *array2[k][j];

getch();

Output

Enter the value of m and n

3 3

Enter matrix array1

4 5 6

1 2 3

3 7 8

Matrix array1

4  5  6

2  3

7  8

Enter matrix array2

5 6 9

8 5 3

9 1

Matrix array2

6  9

8  5  3

2  9  1

The product matrix is

72103 57

27 43 18

87125 56

Calculate the Sum of the Elements of each Row & Column

#include

#include

int Addrow(int array1[10][10], int k, int c);

int Addcol(int array1[10][10], int k, int r);

void main()

    int arr[10][10];

    int i, j, row, col, rowsum, colsum, sumall=0;

    printf("Enter the order of the matrix \n");

    scanf("%d %d", &row, &col);

    printf("Enter the elements of the matrix \n");

    for (i = 0; i < row; i++)

        for (j = 0; j < col; j++)

            scanf("%d", &arr[i][j]);

    printf("Input matrix is \n");

    for (i = 0; i < row; i++)

        for (j = 0; j < col; j++)

            printf("%3d", arr[i][j]);

        printf("\n");

        for (i = 0; i < row; i++)

        rowsum = Addrow(arr, i, col);

        printf("Sum of row %d = %d\n", i + 1, rowsum);

    for (j = 0; j < col; j++)

        colsum = Addcol(arr, j, row);

        printf("Sum of column  %d = %d\n", j + 1, colsum);

        for (j = 0; j < row; j++)

        sumall = sumall + Addrow(arr, j, col);

    printf("Sum of all elements of matrix = %d\n", sumall);

int Addrow(int array1[10][10], int k, int c)

    int rsum = 0, i;

    for (i = 0; i < c; i++)

        rsum = rsum + array1[k][i];

    return(rsum);

int Addcol(int array1[10][10], int k, int r)

    int csum = 0, j;

    for (j = 0; j < r; j++)

        csum = csum + array1[j][k];

    return(csum);

    getch();

Output

Enter the order of the matrix

3 3

Enter the elements of the matrix

2 3 4

7 1 5

3 8 9

Input matrix is

  2  3  4

  7  1  5

  3  8  9

Sum of row 1 = 9

Sum of row 2 = 13

Sum of row 3 = 20

Sum of column  1 = 12

Sum of column  2 = 12

Sum of column  3 = 18

Sum of all elements of matrix = 42

#include

#include

#include

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");

    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");

       getch();

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