成绩转换

 1 #include <math.h>
 2 #include <stdio.h>
 3 
 4 int main(void)
 5 {
 6     int r;
 7 
 8     while (scanf("%d", &r) != EOF)
 9     {
10         if (r < 0)
11             puts("Score is error!");
12         else if (r < 60)
13             puts("E");
14         else if (r < 70)
15             puts("D");
16         else if (r < 80)
17             puts("C");
18         else if (r < 90)
19             puts("B");
20         else if (r < 101)
21             puts("A");
22         else
23             puts("Score is error!");
24     }
25 
26     return 0;
27 }