gaus

#include "pch.h"
#include <iostream>
using namespace std;
int main()
{
    int n;
    double arr[100][100];
    cout<<"razmer matric"<<endl;
    cin >> n;
    cout<<"matrica"<<endl;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j <= n; j++) {
            cin >> arr[i][j];
        }
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j <= n; j++) {
            cout << arr[i][j] << " ";
        }
        cout << endl;
    }
    cout << endl;
    double temp;
    for (int i = 0; i < n; i++) {
        temp = arr[i][i];
        for (int j = i; j <=n; j++) {
            arr[i][j] /= temp;
        }
        for (int j = i+1; j < n; j++) {
            temp = arr[j][i];
            for (int z = i; z <= n; z++) {
                arr[j][z] -= temp * arr[i][z];
            }
        }
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j <= n; j++) {
            cout << arr[i][j] << " ";
        }
        cout << endl;
    }
    double x[100];
    for (int i = n - 1; i >= 0; i--) {
        x[i] = arr[i][n];
        for (int j = n - 1; j > i; j--) {
            x[i] -= arr[i][j]*x[j];
        }
    }
    for (int i = 0; i < n; i++) {
        cout << x[i] << endl;
    }
    return 0;
}