C++第八天

前两天电脑出了问题，今日续上
问题：统计文本中单词出现的次数，并输出所在行号，及该行内容

#include <fstream>
#include <iostream>
#include <sstream>
#include <string>
#include <map>
#include <vector>
using namespace std;
int main()
{
        ifstream ifile;
        char buf[1000]={'\0'};
        ifile.open("poet.txt",ios::in);
        map<string,int>map_word_times;
        vector<string>lines;
        int line_num=1;
        int temp_line=0;
        
        string inputs;
        cout << "input a word to see:";
        cin >> inputs;

        while(ifile.getline(buf,1000))
        {
                lines.push_back(buf);
                istringstream line(buf);
                string s;
                int i=1;

                while(line >> s)
                {

                        pair<map<string,int>::iterator,bool>judge;
                        judge = map_word_times.insert(pair<string,int>(s,i));

                        if(judge.second!=1)
                        {
                                map_word_times[s]++;
                        }

                        if(s==inputs && line_num!=temp_line)
                        {
                                cout << "It appears in line" << line_num << endl;
                                cout << buf << endl;
                                temp_line=line_num;
                        }
                }
                line_num++;
        }

        cout << "In total, it appears: " << map_word_times[inputs] << "times." << endl;