C++笔记 谓词 2

#include <stdio.h>
#include <string>
#include <iostream>
#include <fstream>
#include <iterator>
#include <vector>
#include <algorithm>
#include <map>
using namespace std;
map<string,int> map_meng;

void print(const pair<string,int> &r)
{
    cout<<r.first<<" "<<r.second<<endl;
}

void record(const string &s)
{
    map_meng[s]++;
}
bool gt10(const pair<string,int> &r)
{
    return r.second>10;
}
bool gt9(const pair<string,int> &r)
{
    return r.second>9;
}
int  main()
{
    
    ifstream is("1");

    istream_iterator<string> ii(is);
    istream_iterator<string> eos;

    for_each(ii,eos,record);
//    for_each(map_meng.begin(),map_meng.end(),print);

    map<string,int>::iterator p;
    p=find_if(map_meng.begin(),map_meng.end(),gt10);
    cout<<p->first<<" "<<p->second<<endl;

    cout<<count_if(map_meng.begin(),map_meng.end(),gt9)<<endl;

    return 0;
}