Row Sum and Column Sum of a Matrix in C

Row Sum and Column Sum of a Matrix in C. Previously we had developed multiple C program on matrix like C program to find the Addition of two Matrix, C program to find subtraction of two matrices, C Program to Find Multiplication of two Matrix, C program to Find Transpose of a Matrix, Sum of diagonal elements in C. Now let us develop a simple program to find the row sum and column sum of a matrix.

#include<stdio.h>
// function to find and display 
// row and column sum of a 3x3 matrix
void sum(int m[3][3])
{
  int rowsum, columnsum;

  for(int i=0; i<3; i++)
  {
    rowsum = 0;
    columnsum = 0;

    for(int j=0;j<3;j++)
    {
      rowsum += m[i][j];
      columnsum += m[j][i];
    }

    printf("Sum of row %d = %d,\t", i, rowsum);
    printf("Sum of Column %d = %d\n", i, columnsum);
  }
}

// function to display 3x3 matrix
void display(int matrix[3][3])
{
  for(int i=0; i<3; i++)
  {
    for(int j=0; j<3; j++)
      printf("%d\t",matrix[i][j]);

    printf("\n"); // new line
  }
}

// main function
int main()
{
  // take a 3x3 matrix
  int a[][3] = { {1,2,3}, {4,5,6}, {7,8,9} };

  // print matrix
  printf("Entered matrix is:\n");
  display(a);

  // find row sum and column sum
  sum(a); 

  return 0;
}

Output:-

Entered matrix is:
1 2 3
4 5 6
7 8 9
Sum of row 0 = 6, Sum of Column 0 = 12
Sum of row 1 = 15, Sum of Column 1 = 15
Sum of row 2 = 24, Sum of Column 2 = 18

In this matrix operations program, we had written logic in C programming to find the sum of each column, and the sum of each row. First, we had taken a matrix and then displayed it on the screen. After that sum of columns and the sum of rows is calculated and displayed.

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