Determinant of 2 * 2 Matrix in C

//Determinant of a 2*2 Matrix

#include<stdio.h>

#include<conio.h>

void main()

{

 int i,j,a[2][2],det;

 clrscr();

 printf("Enter the elements of matrix\n");

 for(i=0;i<2;i++)

 {

  for(j=0;j<2;j++)

  {

   scanf("%d",&a[i][j]);

  }

 }

 printf("Matrix is\n");

 for(i=0;i<2;i++)

 {

  for(j=0;j<2;j++)

  {

   printf("\t%d",a[i][j]);

  }

  printf("\n\n");

 }

 det=a[0][0]*a[1][1]-a[0][1]*a[1][0]; //calculation of determinant

 printf("Determinant of 2*2 Matrix is = %d",det);

 getch();

}