Determinant of a 3*3 Matrix in C

//Determinant of a 3*3 Matrix

#include<stdio.h>

#include<conio.h>

void main()

{

 int i,j,a[3][3],d1,d2,d3,det;

 clrscr();

//Enter the elements of Matrix

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

 for(i=0;i<3;i++)

 {

  for(j=0;j<3;j++)

  {

   scanf("%d",&a[i][j]);

  }

 }

//Display of Matrix

 printf("Matrix is\n");

 for(i=0;i<3;i++)

 {

  for(j=0;j<3;j++)

  {

   printf("\t%d",a[i][j]);

  }

  printf("\n\n");

 }

//Calculation of determinant of Matrix

 d1=a[0][0]*((a[1][1]*a[2][2])-(a[1][2]*a[2][1]));

 d2=a[0][1]*((a[1][0]*a[2][2])-(a[1][2]*a[2][0]));

 d3=a[0][2]*((a[1][0]*a[2][1])-(a[1][1]*a[2][0]));

 det=d1-d2+d3;

 printf("Determinant of 3*3 Matrix is = %d",det);

 getch();

}