Perform various operations on elements of the matrix

Posted on Apr 25, 2020

C program to to read a matrix and find the following using functions

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 sum_row(int mat[MAX][MAX], int row, int col)
{
    int i, j, sum;
    printf("\n");
    for(i=0;i<row;i++)
    {
        sum = 0;
        for(j=0;j<col;j++)
        {
            sum = sum + mat[i][j];
        }
        printf("Sum of row %d\t:%d",i+1,sum);
        printf("\n");
    }
}

void sum_col(int mat[MAX][MAX], int row, int col)
{
    int i, j, sum;
    printf("\n");
    for(i=0;i<col;i++)
    {
        sum = 0;
        for(j=0;j<row;j++)
        {
            sum = sum + mat[j][i];
        }
        printf("Sum of column %d\t:%d",i+1,sum);
        printf("\n");
    }
}

void sum_diag(int mat[MAX][MAX], int row, int col)
{
    int i, j, sum, sum1;
    printf("\n");

    if(row == col)
    {
        sum = 0;
        sum1 = 0;
        for(i=0;i<row;i++)
        {
            for(j=0;j<col;j++)
            {
                if(i==j)
                {
                    sum = sum + mat[i][j];
                }
                if(row-i-1 == j)
                {
                    sum1 = sum1 + mat[i][j];
                }
            }
        }
        printf("Sum of main diagonal\t:%d",sum);
        printf("\nSum of minor diagonal\t:%d",sum1);
    }
    else
    {
        printf("For diagonals matrix should be a square matrix");
    }
}

void sum_prod_ele(int mat[MAX][MAX], int row, int col)
{
    int i, j, sum;
    long int prod;
    printf("\n");
    sum = 0;
    prod = 1;
    for(i=0;i<row;i++)
    {
        for(j=0;j<col;j++)
        {
            sum = sum + mat[i][j];
            prod = prod * mat[i][j];
        }
    }
    printf("Sum of elements of the matrix\t:%d",sum);
    printf("\nProduct of elements of the matrix\t:%ld",prod);
}

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

    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);

    sum_row(mat, row, col);
    sum_col(mat, row, col);
    sum_diag(mat, row, col);
    sum_prod_ele(mat, row, col);

    getch();
}

Output

Enter the number of rows        :3
Enter the number of columns     :3
Enter the elements of the matrix
Element [0][0]  :1
Element [0][1]  :2
Element [0][2]  :3
Element [1][0]  :4
Element [1][1]  :3
Element [1][2]  :2
Element [2][0]  :1
Element [2][1]  :2
Element [2][2]  :3

Matrix entered is
1       2       3
4       3       2
1       2       3

Sum of row 1    :6
Sum of row 2    :9
Sum of row 3    :6

Sum of column 1 :6
Sum of column 2 :7
Sum of column 3 :8

Sum of main diagonal    :7
Sum of minor diagonal   :7
Sum of elements of the matrix   :21
Product of elements of the matrix       :864