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/*
    University  : HTI
    CodeName    : Write a program to get the inverse of matrix[2][2]
    SubjectName : Programming Structure
    SubjectCode : csc121
    Group       : https://www.facebook.com/groups/1421186571334814
    event       : Ready to final
*/

#include "stdafx.h"
#include "iostream"

using namespace std;

int main(void)
{

    float x[2][2], y[2][2], k;

    for(int i = 0; i < 2; i++)
    {
        for(int n = 0; n < 2; n++)
        {
            cout << "X[" << (i+1) << "][" << (n+1) << "]= ";
            cin >> x[i][n];
        }
    }

    k = x[0][0]*x[1][1] - x[0][1]*x[1][0];

    if(k == 0)
    {
        cout << "There is no inverse for this matrix!";
    } else {
        y[0][0] = x[1][1] / k;
        y[0][1] = - x[0][1] / k;
        y[1][0] = - x[1][0] / k;
        y[1][1] = x[0][0] / k;

        // print inverse matrix
        for(int i = 0; i < 2; i++)
        {
            for(int n = 0; n < 2; n++)
            {
                cout << " " << y[i][n] << " ";
            }
            cout << endl;
        }
    }

}