成绩转换 哪里错

Question

 #include <stdio.h>int main (){ double N; int x; scanf ("%lf",&N);while(N<10){ scanf("%d",&x);  switch (int(x/10)) { case 10:case 9: printf ("A\n");break;  case 8: printf ("B\n");break; case 7: printf ("C\n");break; case 6: printf ("D\n");break; default: printf ("E\n");break; }} return 0;      }

Answer 1

少了N++;