Inverse.java

import java.util.Scanner;
 
public class Inverse {
    public static void main(String args[]) {
        int i, j;
        float det, temp;
        float mat[][] = new float[2][2];
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter elements of matrix row wise:");
        for(i = 0; i < 2; ++i)
            for(j = 0; j < 2; ++j)
            mat[i][j] = sc.nextFloat();
            det = (mat[0][0] * mat[1][1]) - (mat[0][1] * mat[1][0]);
            System.out.println("\ndeterminant = " + det);
            temp = mat[0][0];
            mat[0][0] = mat[1][1];
            mat[1][1] = temp;
            mat[0][1] = - mat[0][1];
            mat[1][0] = - mat[1][0];
        System.out.println("\nInverse of matrix is:");
        for(i = 0; i < 2; ++i) {
            for(j = 0; j < 2; ++j)
            System.out.print((mat[i][j]/det) + " ");
            System.out.print("\n");
        }
    }
}