#include<stdio.h>
 #include<math.h>
 #include<stdlib.h>
 #define LEN 520520
int main()
{
  int  a,b,c,d,h,j,i,k,l;
  while(scanf("%d %d",&a,&b)!=EOF)
  {
      h=1;
      l=1;
          for(i=2;i<7368788;)
      {
          k=sqrt(i);
               for(j=2;j<=k;j++)
            {
                if(i%j==0)
                  {l=0;break;}
            }
                if(l==1)
                  {
                      h++;
                    if(h>=a&&h<=b)
                        printf("%d ",i);
                    else if(h>b)
                        break;
                    else if(h<a)
                        printf("");
                  }
                  i++;
      }
  }


}

请把你的问题描述清楚哦！
输入，输出！