C++笔记谓词 2

 1 #include <stdio.h>
 2 #include <string>
 3 #include <iostream>
 4 #include <fstream>
 5 #include <iterator>
 6 #include <vector>
 7 #include <algorithm>
 8 #include <map>
 9 using namespace std;
10 map<string,int> map_meng;
11 
12 void print(const pair<string,int> &r)
13 {
14     cout<<r.first<<" "<<r.second<<endl;
15 }
16 
17 void record(const string &s)
18 {
19     map_meng[s]++;
20 }
21 bool gt10(const pair<string,int> &r)
22 {
23     return r.second>10;
24 }
25 bool gt9(const pair<string,int> &r)
26 {
27     return r.second>9;
28 }
29 int  main()
30 {
31     
32     ifstream is("1");
33 
34     istream_iterator<string> ii(is);
35     istream_iterator<string> eos;
36 
37     for_each(ii,eos,record);
38 //    for_each(map_meng.begin(),map_meng.end(),print);
39 
40     map<string,int>::iterator p;
41     p=find_if(map_meng.begin(),map_meng.end(),gt10);
42     cout<<p->first<<" "<<p->second<<endl;
43 
44     cout<<count_if(map_meng.begin(),map_meng.end(),gt9)<<endl;
45 
46     return 0;
47 }
C++笔记 谓词 2

C++笔记谓词 2
