Question

Se citeste un nr. natural n si o matrice patratica. Sa se calculeze suma elementelor de sub diagonala principala

repede plss

Answer 1

Răspuns:

#include <iostream>

using namespace std;

int n,a[101][101];

long long s=0;

int main()

{

cin>>n;

for(int i=1;i<=n;i++)

for(int j=1;j<=n;j++)

cin>>a[i][j];

for(int i=1;i<=n;i++)

for(int j=1;j<=n;j++)

if(i>j)

s+=a[i][j];

cout<<s;

return 0;

}