Liviu19Ex1

#include <iostream>
using namespace std;
int main() {
    int i, j, k, n = 3;
    float a[10][10], b, x[10];

    cout << "Introduceti elementele: " << endl;
    for (i = 1; i <= n; i++) {
        for (j = 1; j <= n + 1; j++) {
            cout << "A[" << i << ", " << j << "] = ";
            cin >> a[i][j];
        }
    }

    // calcularea elementului matricei diagonale
    for (j = 1; j <= n; j++) {
        for (i = 1; i <= n; i++) {
            if (i != j) {
                b = a[i][j] / a[j][j];
                for (k = 1; k <= n + 1; k++)
                    a[i][k] = a[i][k] - b * a[j][k];
            }
        }
    }
    cout << "Solutia este:" << endl;
    for (i = 1; i <= n; i++) {
        x[i] = a[i][n + 1] / a[i][i];
        cout << "X" << i << " = " << x[i] << endl;
    }
    return 0;
}