find sum of individual column of a matrix in c

1/* C Program to find Sum of columns in a Matrix  */
2
3#include<stdio.h>
4 
5int main()
6{
7    int i, j, rows, columns, a[10][10], Sum;
8    
9    printf("Please Enter Number of rows and columns  :  ");
10    scanf("%d %d", &i, &j);
11    
12    printf("Please Enter the Matrix Row and Column Elements \n");
13    for(rows = 0; rows < i; rows++)
14    {
15        for(columns = 0; columns < j; columns++)
16        {
17            scanf("%d", &a[rows][columns]);
18        }
19    }
20    
21    for(rows = 0; rows < i; rows++)
22    {
23        Sum = 0;
24        for(columns = 0; columns < j; columns++)
25        {
26            Sum = Sum + a[columns][rows];
27        }
28        printf("The Sum of Column Elements in a Matrix =  %d \n", Sum );
29    }
30    
31    return 0;
32}

1#include <stdio.h>
2void main ()
3{
4    int i,j,matrix[10][10],m,n,sum=0;
5
6    printf("Enter number of rows of matrix  : ");
7    scanf("%d", &m);
8    printf("Enter number of columns of matrix  : ");
9    scanf("%d", &n);
10
11    printf("\n");
12
13    for (i = 0; i < m; i++)
14    {
15        for (j = 0; j < n; j++)
16        {
17            printf("Enter element of matrix [%d][%d]: ", i, j);
18            scanf("%d", &matrix[i][j]);
19        }
20    }
21
22    printf("\n");
23
24    for (i = 0; i < m; ++i)
25    {
26        for (j = 0; j < n; ++j)
27        {
28            sum = sum + matrix[i][j] ;
29        }
30
31        printf("Sum of the %d row is = %d\n", i+1, sum);
32        sum = 0;
33
34    }
35}
36

1#include <stdio.h>
2void main ()
3{
4    int i,j,matrix[10][10],m,n,sum=0;
5
6    printf("Enter number of rows of matrix  : ");
7    scanf("%d", &m);
8    printf("Enter number of columns of matrix  : ");
9    scanf("%d", &n);
10
11    printf("\n");
12
13    for (i = 0; i < m; i++)
14    {
15        for (j = 0; j < n; j++)
16        {
17            printf("Enter element of matrix [%d][%d]: ", i, j);
18            scanf("%d", &matrix[i][j]);
19        }
20    }
21
22    printf("\n");
23
24    for (j = 0; j < n; ++j)
25    {
26        for (i = 0; i < m; ++i)
27        {
28            sum = sum + matrix[i][j];
29        }
30
31        printf("Sum of the %d column is = %d\n", j+1, sum);
32        sum = 0;
33    }
34}
35
36