Determinant code in c programming

 #include<stdio.h>

#include<conio.h>

 //determunant

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("\nmatrix 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: %.2f\n", determinant);

getch();

return 0 ;

}