2d Arrays

Hello there, im new to c-programming, and i ran accross a problem, a big big problem

the task the program was suppose to do is to read a matrix from a file that's nxn, and create upper and lower matrices with it. However, i ran into trouble when i try to pass my array to a function to initialize it.

im getting an error message of:
subscripted value is neither array nor pointer.

here is my code:

Code:

#include <stdio.h>
#include <math.h>


void
init_U (double *InputU, int n)
{

int i,j;


for (i = 0; i < n; i++)
{
	for (j = 0; j < n; j++)
		{
			if (i != j)
			{
				*InputU[i][j] = 0; /*error here*/
			}
			else
			{
				*InputU[i][j] = 1; /*error here*/
			}
		}
}
}


int
main(void)
{

int n, temp_value;
int i, j;
double **A, **U, **L;
FILE *inp;

inp = fopen ("d1.txt", "r");
fscanf (inp, "%d", &n);


/*------------------------------------------------------------*/

A = (double **) calloc (n,sizeof(double*));
U = (double **) calloc (n,sizeof(double*));
L = (double **) calloc (n,sizeof(double*));

for (i = 0; i < n; i++)
{
A[i] = (double *) calloc (n, sizeof(double));
U[i] = (double *) calloc (n, sizeof(double));
L[i] = (double *) calloc (n, sizeof(double));
}


/*------------------------------------------------------------*/

for (i = 0; i < n; i++)
{
	for (j = 0; j < n; j++)
		{
			fscanf(inp, "%lf", &A[i][j]);
		}
}

/*------------------------------------------------------------*/

init_U(&**U, n);

/*------------------------------------------------------------*/
fclose(inp);
return(0);

}

Any help would be greatly appreciated. Thanks a lot in advance.

The reason you get an error is because your function prototype and usage is wrong. You have a pointer to a pointer, so make a function that takes that.

Code:

void foo( double **array, int bar )
{
    ...do stuff...
}

...do more stuff...

double **myarray;
...do more more stuff...

foo( myarray );

Quzah.

oh my
never saw that coming

im still pretty newb when it comes to c programming

thanks a lot!