在输入文件中找到所有相同的连续行组。在输出文件中放置每个这样的组的信息，包括重复行的文本，重复的数量和该组开始的行号。

随意设计输出格式
输入文件为in.txt
输出文件为out.txt

样例？？？？？？？？？？？？？？？

#include <iostream>
#include <fstream>
#include <string>

int main()
{
    std::ifstream fi;
    fi.open("in.txt", std::ios::in);
    if (!fi.is_open())
    {
        std::cout << "open file in.txt fail" << std::endl;
        return -1;
    }
    std::ofstream fo;
    fo.open("out.txt", std::ios::out);
    if (!fo.is_open())
    {
        std::cout << "open file out.txt fail" << std::endl;
        return -1;
    }
    std::string str, str1;
    getline(fi, str1);
    int start = 0;
    int line = 1;
    int count = 1;
    while (getline(fi, str))
    {
        if (str == str1)
        {
            count++;
        }
        else
        {
            if (count > 1)
            {
                fo << str1 << " " << start << " " << count << std::endl;
            }
            start = line;
            str1 = str;
            count = 1;
        }
        line++;
    }
    if (count > 1)
    {
        fo << str1 << " " << start << " " << count << std::endl;
    }
    return 0;
}

#include <iostream>
#include <fstream>
#include <string>
#include <map>
#include <utility>

int main(int argc, char *argv[])
{
    std::ifstream fi;
    fi.open("in.txt", std::ios::in);
    if (!fi.is_open())
    {
        std::cout << "open file in.txt fail" << std::endl;
        return -1;
    }
    std::ofstream fo;
    fo.open("out.txt", std::ios::out);
    if (!fo.is_open())
    {
        std::cout << "open file out.txt fail" << std::endl;
        return -1;
    }
    std::map<string,std::pair<int,int>> m_str;
    std::string str;
    int line_no = 1;
    while (getline(fi, str))
    {
        if(m_str.count(str))
        {
            m_str[str].second++;
            line_no++;
        }
        else
        {
            m_str[str].first = line_no;
            m_str[str].second++;
            line_no++;
        }
    }
    for(std::map<string,std::pair<int,int>>::iterator it = m_str.begin();it != m_str.end();++it)
    {
        if(it->second.second == 1) continue;
        fo<<it->first<<" "<<it->second.first<<" "<<it->second.second<<endl;
    }
    cout<<"finish..."<<endl;
    return 0;
}