搞不清楚了555求大佬看看

 #include<stdio.h>
  #include<stdbool.h>
  bool isPrime(int num)
  {
      if(num<2) return false;
      else for(int i=2;i*i<=num;i++)
      {
          if(num%i==0) return false;
      }
      return true;
              
  }
bool isReverse(int num)
{
    int originnumber=num;
    int reversenumber=0;
    while(num>0)
    {
       int t =num%10;
        num=num/10;
        reversenumber=reversenumber*0+t;
    }
    return reversenumber==originnumber;
}
bool isPrimeReverse (int num)
{
    return isPrime(num) && isReverse(num);
}
int main()
{
    int a,b;
    scanf("%d%d",&a,&b);
    int num;
    for(num=a;num<=b;num++)
    {
        if(isPrimeReverse(num))
            printf("%d\n",num);
    }
    return 0;
}