Sieve of Eratosthenes Help

[Dead Veng]

So I've been assigned a program that sieves all non prime numbers from 0-1000. I've written the meat of this code but have a problem. Normally I have a Linux computer with a different compiler, but for this one I'm stuck using Visual Studio 2010. Here's what I have so far. My only problem is the line "int *array = calloc(topval + 1, sizeof(int));" The error is that type void* cannot initialize type int*. Any solutions would be appreciated!!

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

int main(int argc, char **argv)
{
int i;
int prime;
int multiple;
int topval = 1000;
int count = topval - 1;
int *array = calloc(topval + 1, sizeof(int));


/*Marks all elements of the array as possible primes.*/
for (i=2; i <= topval; i++)
{
array[i] = 1;
}

/*Marks multiples as non-prime.*/
for (prime = 2; prime <= topval; prime++)
{
if (array[prime])
for (multiple = 2*prime; multiple <= topval; multiple += prime)
{
if (array[multiple])
{
array[multiple] = 0;
count--;
}
}
}

/*Prints the remaining numbers, which are prime. */
for (i=2; i <= topval; ++i)
{
if (array[i])
printf("%d ", i);
}
printf("\n\n %d primes up to %d found.\n", count, topval);
exit(0);
}

[weaknessforcats]

An int* has to contain the address of an int otherwise the pointer arithmetic won't work. Put any old address in an int* and the program is now ready to crash. For this reason void* can't be assigned to an int*.

All you have to do is cast the return of calloc to an int*. That way when you crash the compiler will not be responsible.