Finding determinant

[wu_weidong]

Hi,
I'm trying to write a program that finds the determinant of a matrix A recursively, however, I keep getting error messages.

My code:

#define n 3
#include <stdio.h>
#include <math.h>

int det(int A[][n], int n)  <-- Line 5
{
    int i, j, k, h, d = 0;
    int m[n-1][n-1] = {0};

    if (n == 2)
        d = A[0][0]*A[1][1] - A[1][0]*A[0][1];  <-- Line 11
    else 
    {
        d = 0;
        for (k = 0 ; k < n ; k++)
        {
            /* Create minor matrix */
            for (i = 1 ; i < n ; i++)
            {
                h = 0;
                for (j = 0; j < n; j++)
                {
                    if (j == k)
                    	continue;
                    m[i-1][h] = A[i][j];
                    h++;
                }
            }
            
            /* sum of (+/-)cofactor * minor matrix */
            d += pow(-1.0, k) * A[0][k] * det(m, n-1);
        }
    }
    return d;
}

int main()
{
   int determinant;
   int A[n][n] = {{3,-1,-1},{2,-1,1},{1,-3,2}};

   determinant = det(A, n);
   printf("d = %d\n", determinant);
   
   return 0;
}

I keep getting the error message

determinant.c:5: error: syntax error before numeric constant
determinant.c: In function `det':
determinant.c:11: error: `A' undeclared (first use in this function)

I can't seem to find out what is wrong with my det function header.

Please advise.

Thank you.

Regards,
Rayne

[greenberet]

well you're defining the formal argument to the det function (i.e n) with the same name as the constant
you defined.
i.e #define n