程序：运用函数找出100至200的素数，并数出个数

#include<stdio.h>
int if_a_is_prime(int d)
{
  int c = 2;
  for (c = 2; c<d ; c++)
  {
    if ( d%c == 0)
    {
      return 0;
    }
  }
  return 1;

}

int main()
{
  int a = 100;
  int b = 0;
  int count = 0;
  for (a = 100; a <= 200; a++)
  {

    if ( if_a_is_prime(a)== 1)
    {
      printf("%d ", a);
      count++;
    }

  }

  printf("\n总共有%d个素数", count);
  return 0;
}