Sum above the main diagonal

Question

/*Calculate the total sum of element that are located above the main diagonal in a given NxN square table.

Input
First line N (1<=N<=100).
Then NxN table is given(all number are integers)

Output
The total sum of element that are located under main diagonals

Sample input:
3
1 2 3
1 5 6
1 1 8

Sample output:
11

What is wrong?*/

#include <iostream>
using namespace std ;

int main (){
int n ,sum;
cin >> n ;
int aza[100][100];
for (int i=0;i<n;i++){
for(int j=0;j<n;j++){
cin >> aza[i][j];

}
}
for(int i = 0; i < n; i++){
for(int j = 0; j < i; j++){
sum += aza[i][j];

}

}
cout << sum;

}

Answer 1

How sample output is 11.. May I know?

Answer 2

2 + 3 +6 =11

Answer 3

#include <iostream>
using namespace std ;

int main (){
int n ,sum;
cin >> n ;
int aza[100][100];
for (int i=0;i<n;i++){
for(int j=0;j<n;j++){
cin >> aza[i][j];

}
}
for(int i = 0; i < n; i++){
for(int j = i+1; j < n; j++){ //changed here.Azat Malgazhdar
sum += aza[i][j];

}

}
cout << sum;
}

Answer 4

Maybe this could help