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https://pintia.cn/problem-sets/12/problems/346

这个程序的算法不难，因为没有学透标准输入和输出，特别是gets()函数。如果不用getchar()读取多余的' '，程序就会运行错误。

 1 #include <stdio.h>
 2 #include <stdlib.h>
 3 
 4 struct book
 5 {
 6     char title[31];
 7     double price;
 8 };
 9 int main(void)
10 {
11     int i, n, min, max;
12     struct book *p;
13 
14     scanf("%d", &n);
15     p = (struct book *)calloc(n, sizeof(struct book));
16    
17     for (i = 0; i < n; i++)
18     {
19         getchar();
20         gets((p+i)->title);
21         scanf("%lf", &((p+i)->price));
22     }
23     min = max = 0;
24     for (i = 1; i < n; i++)
25     {
26         if ((p + i)->price > (p + max)->price)
27         {
28             max = i;
29         }
30         if ((p + i)->price < (p + min)->price)
31         {
32             min = i;
33         }
34     }
35     printf("%.2f, %s
", (p + max)->price, (p + max)->title);
36     printf("%.2f, %s
", (p + min)->price, (p + min)->title);
37 
38     free(p);
39     return 0;
40 }