Generation of prime number in c

#include<stdio.h>
#include<conio.h>

int main()
{
 int num, n, div, p;
 printf("Enter any number: ");

 scanf("%d", &num);

 for(n = 2; n <= num; n++)
 {
  for(div = 2; div < n; div++)
  {
   if(n % div == 0)
   {
     p = 0;
     break;
   }
   p = 1;
  }
  if(p)
    printf("%d ",n);
 }
 return 0;
}