Inverse matrix in c programming

 #include<stdio.h>

 #include<conio.h>

int main(){

int mat[3][3], i, j;

float determinant = 0;

printf("Enter elements of matrix 3*3:\n");

for(i = 0; i < 3; i++)

for(j = 0; j < 3; j++)

           scanf("%d", &mat[i][j]);

printf("\nGiven matrix is:");

for(i = 0; i < 3; i++){

printf("\n");

for(j = 0; j < 3; j++)

printf("%d\t", mat[i][j]);

}

//finding determinant

for(i = 0; i < 3; i++)

determinant = determinant + (mat[0][i] * (mat[1][(i+1)%3] * mat[2][(i+2)%3] - mat[1][(i+2)%3] * mat[2][(i+1)%3]));

printf("\n\ndeterminant: %0.2f\n", determinant);

printf("\nInverse of matrix is: \n");

for(i = 0; i < 3; i++){

for(j = 0; j < 3; j++)

printf("%.2f\t",((mat[(j+1)%3][(i+1)%3] * mat[(j+2)%3][(i+2)%3]) - (mat[(j+1)%3][(i+2)%3] * mat[(j+2)%3][(i+1)%3]))/ determinant);

printf("\n");

}

   getch();

   return 0;

}