#include <iostream>
#include <math.h>

using namespace std;



int main()
{
    double arr[3][3] = { {4,-1,1},{2,6,-3},{1,2,-3} };
    double b[3] = { 4,7,0 };
    double e = 0.001;
    int M = 100, l = 0, k = 1;
    int n = 3;
    double xi[3] = { 0,0,0 };
    int r = 0;
    double d = 0;
    while (l <= 0)
    {
        for (int i = 1; i < n; i++)
        {
            int s = 0;
            for (int j = 0; j < i - 1; j++)
            {
                s += arr[i][j];
            }
            for (int j = 0; j < n; j++)
            {
                s += arr[i][j];
            }
            double x = (b[i] - s) / arr[i][r];
            d = abs(x - xi[i]);
            xi[i] = x;
            r++;
        }
        if (d <= e)
        {
            l = 1;
        }
        else if(k = M)
        {
            l = 2;
        }
        else
        {
            k += 1;
        }
    }
    for (int i = 1; i <= n; i++)
        cout << "x[" << i << "]=" << xi[i] << " " << endl;
}