按等级统计学生成绩

 1 int set_grade(struct student *p, int n)
 2 {
 3     int i, count;
 4 
 5     count = 0;
 6     for (i = 0; i < n; i++)
 7     {
 8         if ((p + i)->score >= 85)
 9         {
10             (p + i)->grade = ‘A‘;
11         }
12         else if ((p + i)->score >= 70)
13         {
14             (p + i)->grade = ‘B‘;
15         }
16         else if ((p + i)->score >= 60)
17         {
18             (p + i)->grade = ‘C‘;
19         }
20         else
21         {
22             (p + i)->grade = ‘D‘;
23         }
24 
25         if ((p + i)->score < 60)
26         {
27             count++;
28         }
29     }
30 
31     return count;
32 }