jacobi method

// jacobi method.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "iostream"
using namespace std;

int main()
{
    int a[3][4], c[3][4], i, j, max, n, s;
    for (i = 0;i < 3;i++)
        for (j = 0;j < 4;j++) {
            cout << "[" << i + 1 << "][" << j + 1 << "] : ";
            cin >> a[i][j];
        }
    for (n = 0;n < 3;n++) {
        max = -9999;
        for(i=0;i<3;i++)
            if (a[i][n] > max) {
                max = a[i][n];
                s = i;
            }
        for (j = 0;j < 4;j++)
            c[n][j] = a[s][j];
    }
    for (i = 0;i < 3;i++) {
        for (j = 0;j < 4;j++) {
            cout << c[i][j] << "  ";
        }
        cout << endl;
    }
    float x1, x2, x3, b1, b2, b3;
    b1 = b2 = b3 = 0;
    for (n = 0;n < 6;n++) {
        x1 = (c[0][3] - b2*c[0][1] - b3*c[0][2]) / c[0][0];
        x2 = (c[01][3] - b1*c[1][0] - b3*c[1][2]) / c[1][1];
        x3 = (c[2][3] - b1*c[2][0] - b2*c[2][1]) / c[2][2];
        b1 = x1;
        b2 = x2;
        b3 = x3;
    }
    cout << "x1 = " << x1 << endl << "x2 = " << x2 << endl << "x3 = " << x3 << endl;
    return 0;
}