【HDOJ】1263 水果

hash，使用stl map ac。学了find_if等强大的东西，第一次使用stl模板。
 1 #include <iostream>
 2 #include <cstdio>
 3 #include <cstring>
 4 #include <algorithm>
 5 #include <map>
 6 #include <vector>
 7 using namespace std;
 8 
 9 #define NAMENUM 25
10 
11 typedef struct fruit_st {
12     char name[NAMENUM];
13     char produce[NAMENUM];
14     bool operator < (const fruit_st &a) const {
15         if (strcmp(produce, a.produce))
16             return strcmp(produce, a.produce)>0 ? false : true;
17         else
18             return strcmp(name, a.name)>0 ? false : true;
19     }
20 } fruit_st;
21 
22 class map_finder {
23 public:
24     map_finder(const fruit_st a) {
25         strcpy(fruit.name, a.name);
26         strcpy(fruit.produce, a.produce);
27     }
28     bool operator ()(const map<fruit_st, int>::value_type &pair) {
29         if (strcmp(fruit.name, pair.first.name)==0 && strcmp(fruit.produce, pair.first.produce)==0)
30             return true;
31         else
32             return false;
33     }
34 private:
35     fruit_st fruit;
36 };
37 
38 int main() {
39     map<fruit_st, int> sale_info;
40     map<fruit_st, int>::iterator iter;
41     fruit_st fruit;
42     int case_n, n, num;
43 
44     scanf("%d", &case_n);
45 
46     while (case_n--) {
47         scanf("%d", &n);
48         while (n--) {
49             scanf("%*c%s %s %d", fruit.name, fruit.produce, &num);
50 
51             iter  = find_if(sale_info.begin(), sale_info.end(), map_finder(fruit));
52             if (iter == sale_info.end()) {
53                 sale_info.insert(make_pair(fruit, num));
54                 //sale_info[fruit] = num;
55             }else
56                 iter->second += num;
57         }
58         for (map<fruit_st, int>::iterator ii=sale_info.begin(); ii!=sale_info.end(); ++ii) {
59             if (ii != sale_info.begin()) {
60                 if (strcmp(ii->first.produce, iter->first.produce))
61                     printf("%s
", ii->first.produce);
62                 printf("   |----%s(%d)
", ii->first.name, ii->second);
63             } else {
64                 printf("%s
", ii->first.produce);
65                 printf("   |----%s(%d)
", ii->first.name, ii->second);
66             }
67             iter = ii;
68         }
69         sale_info.clear();
70         if (case_n)
71             printf("
");
72     }
73 
74     return 0;
75 }