Sum_Diagonal.cpp

#include <iostream>
using namespace std;

int main()
{
 int num, D_Num1 = 0, D_Num2 = 0;
 cin >> num;

 int arr[num][num];

 for (int i = 0; i < num; i++)
 {
 for (int j = 0; j < num; j++)
 {
 cin >> arr[i][j];

 if (i == j)
 {
 D_Num1 = D_Num1 + arr[i][j];
 }

 }
 }

 for (int i = 0; i < num; i++)
 {
 for (int j = num - 1 - i; j >= 0;)
 {
 D_Num2 = D_Num2 + arr[i][j];
 break;
 }
 }
 cout << abs(D_Num1 - D_Num2) << endl;

 return 0;
}