Question

杭电acm2004哪错了wrong answer

#include<cstdio>
int main()
{
int score;
while(scanf("%d",&score)!=EOF)
{
switch(score/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;
case 5:
case 4:
case 3:
case 2:
case 1:
case 0:printf("E\n");break;
default:printf("Score is error!\n");
}
}
return 0;
}

Answer 1

-1～-9应该输出的是Score is error!，而不是E。

Answer 2

#include<stdio.h>main(){ int a; while(scanf("%d",&a)!=EOF) { if(a>100||a<0) printf("Score is error!\n"); else if(a>=90) printf("A\n"); else if(a>=80) printf("B\n"); else if(a>=70) printf("C\n"); else if(a>=60) printf("D\n"); else printf("E\n"); }}