Written in C++, used in code blocks. I am stuck on writing the code for the sum

Question

Written in C++, used in code blocks. I am stuck on writing the code for the sum of diagonal elements. This is what i have so far.

#include <stdio.h>

#define SIZE 4

int main()
{
int A[SIZE][SIZE];
int row, col, sum = 0;
int d_sum = 0;

// Wasn't sure how to display the matrix, but I got it so you type in the table exactly how you see it and it will output everything correctly.
//This function below prints your table
printf("Enter elements in matrix of size %dx%d: ", SIZE, SIZE);
for(row=0; row<SIZE; row++)
{
for(col=0; col<SIZE; col++)
{
scanf("%d", &A[row][col]);
}
}
// This function prints all the row sums
for(row=0; row<SIZE; row++)
{
sum = 0;
for(col=0; col<SIZE; col++)
{
sum += A[row][col];
}

printf("Sum of elements of Row %d = %d ", row+1, sum);
}
// This function prints all the column sums
for(row=0; row<SIZE; row++)
{
sum = 0;
for(col=0; col<SIZE; col++)
{
sum += A[col][row];
}

printf("Sum of elements of Column %d = %d ", row+1, sum);
}
// This function prints the diagonal sum.
for(row=0; row<SIZE; row++)
{
sum =0;
for(col=0; col<SIZE;col++)
{
d_sum += A[row][col];
}
printf("Sum of diagonal elements is %d ",d_sum);
}

return 0;
}

-With given values of "a", "b”, “c", "d”, “e", and "f", the answer for x is “Answer', and y is "Answer" 3. For the given table below, 1) use array to calculate row sum, column sum and sum of diagonal elements. 2) And create a new Table Array with the result then display it! 4 8 12 16 6 10 9 13 15 New Table Array 4 8 12 16 Column 4 Sum Row 1 Sum Row 1 Sum Row 1 Sum Row 1 Sum Diagonal 6 10 9 13 Column 1 Sum Column 2 Sum 15 Column 3 S um Sum

Explanation / Answer

#include <stdio.h>
#define SIZE 4
int main()
{
int A[SIZE][SIZE];
int N[SIZE+1][SIZE+1];
int row, col, r_sum,c_sum;
int d_sum = 0;
//This function below prints your table
printf("Enter elements in matrix of size %dx%d: ", SIZE, SIZE);
for(row=0; row<SIZE; row++)
{
for(col=0; col<SIZE; col++)
{
scanf("%d", &A[row][col]);
}
}
// Print Array
for(row=0; row<SIZE; row++)
{
for(col=0; col<SIZE; col++)
{
printf(" %d ", A[row][col]);
}
printf(" ");
}

for(row=0; row<SIZE; row++)
{
r_sum = 0;
c_sum = 0;
for(col=0; col<SIZE; col++)
{
// add A elements to new Array
N[row][col] = A[row][col];
// for row sum
r_sum += A[row][col];
// for column sum
c_sum += A[col][row];
if(row==col){
//for diagonal sum
d_sum += A[row][col];
}
}
//add row sum to new Array
N[row][SIZE] = r_sum;
//add column sum to Array
N[SIZE][row] = c_sum;
}
//add diagonal sum to New Array
N[SIZE][SIZE] = d_sum;

// Print New Array
printf("New Table Array ");
for(row=0; row<SIZE+1; row++)
{
for(col=0; col<SIZE+1; col++)
{
printf(" %d", N[row][col]);
}
printf(" ");
}
return 0;
}
/*
output

Enter elements in matrix of size 4x4:
   1    2    3    4
   5    6    7    8
   9    10    11    12
   13    14    15    15
New Table Array
   1   2   3   4   10
   5   6   7   8   26
   9   10   11   12   42
   13   14   15   15   57
   28   32   36   39   33

*/

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