Glassbird Forum

int a[50][50];   // 50 linii, 50 coloane
float m[10][20];  // 10 linii, 20 coloane
a[0][0] = 5;      // coltul stanga-sus
cout << a[2][3];  // linia 2, coloana 3

a[L][C] | Col0    Col1    Col2    Col3
Linia 0 | a00     a01     a02     a03
Linia 1 | a10     a11     a12     a13
Linia 2 | a20     a21     a22     a23

int n, m, a[50][50];
cin >> n >> m;
for (int i = 0; i < n; i++)
  for (int j = 0; j < m; j++)
    cin >> a[i][j]; // citire
for (int i = 0; i < n; i++) {
  for (int j = 0; j < m; j++)
    cout << a[i][j] << " ";
  cout << endl; // rand nou dupa fiecare linie!
}

Diagonala principala wrote:Stanga-sus -> dreapta-jos. Conditie: i == j (a00, a11, a22...).

Diagonala secundara wrote:Dreapta-sus -> stanga-jos. Conditie (0-based): i + j == n - 1 (a02, a11, a20 la n=3). Cu indexare de la 1: i + j == n + 1. Fii consistent!

Suma totala wrote:Acumulam in parcurgerea completa.

Code: Select all

int sumaTotala = 0;
for (int i = 0; i < n; i++)
  for (int j = 0; j < m; j++)
    sumaTotala = sumaTotala + a[i][j];

Suma pe fiecare linie wrote:RESETAM suma la 0 la inceputul fiecarei linii!

Code: Select all

for (int i = 0; i < n; i++) {
  int sumaLinie = 0;
  for (int j = 0; j < m; j++)
    sumaLinie = sumaLinie + a[i][j];
  cout << "Linia " << i << ": " << sumaLinie << endl;
}