Thread: Using Malloc inside a function

I have written the following code. It initializes an array of size "l," then assigns a value to each element in the array with the function "createArray," and then displays the array with the function "showArray."

Code:

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



void createArray(double *array, long *l)
{	
	long i;
	for(i=0; i < *l; i++)
		array[i]=sin(i/12.0);
}


void showArray(double *array, long l)
{	
	long i;
	for(i=0; i < l; i++)
		printf("array[%d] = %f \n", i, array[i]);	
}


int main()
{

	long i, l = 10;
	double  *array;

	array = malloc(l * sizeof(double));
	
	createArray(array, &l);
	showArray(array, l);
		
	exit(0);
}

What I would like to do is make the "array = malloc(l * sizeof(double));" statement inside the function "createArray." Something like this:

Code:

void createArray(double *array, long *l)
{	
	long i;
        array = malloc(*l * sizeof(double));
	for(i=0; i < *l; i++)
		array[i]=sin(i/12.0);
}

This code runs, but all my numbers are garbage. Any ideas on how I might do this?