|55|error: incompatible type for argument 1 of 'det'

Question

#include <stdio.h>
#if !defined(N)
#define N 3
#endif

double det(double A[N][N], int dim);

int main(void)
{
int dim, j, k;
double A[N][N], det_value;

dim = N;
printf("Matrix A is\n");
for (j = 0; j < N; j++) {
for (k = 0; k < N; k++) {
printf(" %g", A[j][k]);
}
printf("\n");
}
det_value = det(A[N][N], dim);
printf("det(A) = %g\n", det_value);
return 0;
}

double det(double A[N][N], int dim)
{
int i, a, b;
double ce, temp, value, sum_value;

if (dim == 2) {
return A[0][0] * A[1][1] - A[0][1] * A[1][0];
}
else {
ce = 1;
for (i = 0; i < dim; i++){
for (a = 0; a < dim; a++) {
if (a != i) {
for (b = 1; b < dim; b++) {
if (a < i) {
temp = A[i][0];
A[a][b] = A[a + 1][b];
value = ce * temp * det(A[N-1][N-1], dim - 1);
sum_value += value;
ce *= (-1);
}
else if (a > i) {
temp = A[i][0];
A[a][b] = A[a + 1][b + 1];
dim--;
value = ce * temp * det(A[N-1][N-1], dim - 1);
sum_value += value;
ce *= (-1);
}
}
}
}
}
return sum_value;
}

}

/* I'm doing a calculation of a matrix, and I have no idea why it is keep showing the "incompatible type error" messeges. Can anyone help me figure it out ? I will be appreciated. */

Answer 1

I dont know what you are expecting through this program i haven't seen your logics i have analyse your some of the mistakes.
First thing in line number 23

det_value = det(A[N][N], dim);
Here you just need to pass the name of array
det_value = det(A, dim);
Then inside the function definition of det check inside of second if condition you have written det(A[N-1][N-1] ,dim-1)
Here u need to pass a and b i guess u need to pass value same do for other array