求平均成绩 

 1 #include <cstdio>
 2 
 3 struct Stu
 4 {
 5     double score[5];
 6     double sum;
 7     double avg;
 8 };
 9 
10 int main()
11 {
12     int n, m;
13     while(scanf("%d %d", &n, &m) != EOF)
14     {
15         Stu stu[n];
16         double ke[m] = {0}, ke_avg[m] = {0};
17         
18         for(int i = 0; i < n; ++ i)
19         {
20             stu[i].sum = 0;
21             for(int j = 0; j < m; ++ j)
22             {
23                 scanf("%lf", &stu[i].score[j]);
24                 stu[i].sum += stu[i].score[j];
25             }
26             stu[i].avg = stu[i].sum / m;
27         }
28         
29         for(int i = 0; i < n; ++ i)
30         {
31             if(i)    printf(" %.2f", stu[i].avg);
32             else    printf("%.2f", stu[i].avg);
33         }
34         printf("\n");
35         
36         for(int j = 0; j < m; ++ j)
37         {
38             for(int i = 0; i < n; ++ i)
39             {
40                 ke[j] += stu[i].score[j];
41             }
42             ke_avg[j] = ke[j] / n;
43         }
44         for(int i = 0; i < m; ++ i)
45         {
46             if(i)    printf(" %.2f", ke_avg[i]);
47             else    printf("%.2f", ke_avg[i]);
48         }
49         printf("\n");
50         
51         int count = 0;
52         for(int i = 0; i < n; ++ i)
53         {
54             bool flag = true;
55             for(int j = 0; j < m; ++ j)
56             {
57                 if(stu[i].score[j] < ke_avg[j])
58                 {
59                     flag = false;
60                     break;
61                 }
62             }
63             if(flag)    count ++;
64         }
65         printf("%d\n\n", count);
66     }
67     
68     
69     return 0;
70 }

在循环中每个学生的sum初始都要清零(第20行代码)

Wrong Answer(第20行, 结构体中的sum没有初始化)->Accepted

posted @ 2019-07-29 22:40  青衫客36  阅读(135)  评论(0)  编辑  收藏  举报