#include <iostream>

using namespace std;

int main()

{

int n=0;

cout << "Podaj n: ";

cin >> n;

double sum=0;

double a[n][n];

double b[n];

double c[n][n+1];

double x[n];

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

{

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

{

cout <<"Podaj a[" <<i<< "][" <<j<<"]:";

cin >> a[i-1][j-1];

}

cout << endl;

}

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

{

cout << "Podaj b[" << i << "]:";

cin >> b[i-1];

}

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

{

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

{

c[i-1][j-1] = a[i-1][j-1];

}

}

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

{

c[i-1][n] = b[i-1];

}

for (int s=1; s<=(n-1) ;s++ )

{

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

{

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

{

c[i-1][j-1] = (c[i-1][j-1]-(c[i-1][s-1] /

/ c[s-1][s-1]) * c[s-1][j-1]);

}

}

}

x[n-1] = (c[n-1][n] / c[n-1][n-1]);

for(int i=n-1; i>=1; i--)

{

sum=0;

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

{

sum=sum+(c[i-1][s-1]*x[s-1]);

}

x[i-1]= (c[i-1][n]-sum)/c[i-1][i-1];

}

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

{

cout << "x[" <<i << "] = " << x[i-1] << endl;

}

system("PAUSE");

return 0;

}

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