Conflicting types in array function declaration

I know this is an elementary assignment, but I'm new to this. I'm writing a program w/two functions, the first generates 10 random numbers, the second finds their average. The problem I'm having is with declaring the random function. I keep getting the error "Conflicting types for random". I don't see what my error is though. I get the error in the function declaration as well as in the function itself. Here's my code, which I think is good...does anyone have any suggestions?

Thank you very much!


#include <stdio.h>
#include <stdlib.h>
#define ARY_SIZE 10

// Function Declarations
void random (int ary[]);
double average (int ary[]);

int main (void)
{
// Local Declarations
int ary[ARY_SIZE];

// Statements
random(ary);
printf("The average of the random numbers is: %.1lf\n", average(ary));

return 0;

} // main

/* ***************************** Random ********************************
This function fills the arry with random integers, between 10 and 20.
*/

void random (int ary[])
{
// Local Definitions
int range = (20 - 10) + 1;
int i;

// Statements
for (i = 0; i < ARY_SIZE; i++)
ary[i] = rand() % range + 10;

return;
}

/* *************************** Average **********************************
This function takes the random numbers from the random function and finds
their average. It returns it to the main function as a double.
*/

double average (int ary[])
{
// Local Definitions
int i;
int sum = 0;

// Statements
for (i = 0; i < ARY_SIZE; i++)
sum += ary[i];

return ((double)sum/ARY_SIZE);
}

random might be already defined in the header files you are including, try changing the function name and see if the error goes away.

Thank you so much! I've spent two days trying to figure this out, and your suggestion worked perfectly. Thanks again!