#include <iostream>
#include <cstdlib>
#include <ctime>
//---------------------------------------------------------------------------
using namespace std;

int main(int argc, char* argv[])
{
    int sam;
        int W;
    cout << "Jeśli chcesz samemu podawać liczby do macierzy wybierz 0, jeśli chcesz żeby liczby pojawiły się losowo wybierz 1" << endl;
    cin>>sam;
    cout << "podaj rozmiar macierzy ";
    cin >> W;
    float **Tab;
    float **t;
    int i, j, k;
    Tab = new float *[W];
    t = new float*[W];
    for (j = 0; j<W; j++)Tab[j] = new float[j];
    for (j = 0; j<W; j++)t[j] = new float[j];
   if(sam==1){
    cout << "macierz pierwotna to \n\n";
   for (i = 0; i<W; ++i)
    {
        for (j = 0; j<W; ++j)
        {
            Tab[i][j] = rand() % 10;
            cout << Tab[i][j] << " ";
        }
        cout << "\n";
    }
}
if(sam==0){
for(int i = 0 ; i<W ; i++)
    {
        for(int j = 0 ; j<W ; j++)
        {

            cout<<"Podaj liczbe która bedzie w wierszu "<< i<<  " Oraz kolumnie "<<j<< endl; ;
            cin>>Tab[i][j];

        }
        cout<<"\n\n";
    }
    cout << "macierz pierwotna to \n\n";
   for (int i = 0; i<W; ++i)
    {
        for (int j = 0; j<W; ++j)
        {
            cout << Tab[i][j] << " ";
        }
        cout << "\n";
    }
    }
    for (int i = 0; i<W; i++)
    {
        Tab[i][i] = 1 / Tab[i][i];
        for (j = 0; j<W; j++) if (j != i)
        {
            Tab[j][i] = Tab[j][i] * Tab[i][i];
            for (k = 0; k<W; k++) if (k != i)
            {
                Tab[j][k] -= Tab[j][i] * Tab[i][k];
                if (j == (W - 1))
                    Tab[i][k] = -(Tab[i][k] * Tab[i][i]);
            }
        }
    }

    cout << "\nmacierz odwrotna\n\n";
    int w = W - 1;
    for (j = 0; j<w; j++) Tab[w][j] = -(Tab[w][j] * Tab[w][w]);

    for (int i = 0; i<W; i++)
    {
        for (j = 0; j<W; j++)
        {
            cout.width(10);
            cout << Tab[i][j] << " ";
        }
        cout << endl;
    }
    cout << "\n PRESS ENTER";
    cin.sync();
    cin.get();
    for ( int i = 0; i<W; ++i)
    {
        delete[] Tab[i];
        delete[] t;
    }
    delete[] Tab;
    delete[] t;
    return 0;}