#include <stdio.h>

int A[3][3] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 8}};

int main()
{
   int d = A[0][0]*(A[1][1]*A[2][2] - A[1][2]*A[2][1])
         - A[1][0]*(A[0][1]*A[2][2] - A[0][2]*A[2][1])
         + A[2][0]*(A[0][1]*A[1][2] - A[0][2]*A[1][1]); 

   printf("det(A)=%d\n", d);
}