记录C++学习获得的经验点 2018/6/24-2018/6/30

冷不防 2022-05-20 23:07 100阅读 0赞

在桌面上有一个phones.txt  
![这里写图片描述][70]

#include"stdafx.h"
    #include<iostream>
    #include<fstream>
    #include<sstream>
    #include<string>
    #include<vector>
    #include "Sales_data.h"
    using namespace std;
    struct PersonInfo {
        string name;
        vector<string> TeleNums;
    };
    int main(int argc, char **argv) {
       //argc是命令行参数的个数，argv是字符二级指针，可指向一个字符串参数
        const string inputfilelocal= "C:\\Users\\dell\\Desktop\\phones.txt";
        ifstream in(inputfilelocal);
        vector<PersonInfo> vec;
        string line,word;
        istringstream record;
        while (getline(in, line))
        {
            PersonInfo info;
            record.str(line);
            record >> info.name;
            while (record >> word)
            {
                info.TeleNums.push_back(word);
            }
            vec.push_back(info);
            record.clear();
        }
        for (auto a : vec)
        {
            cout << a.name << " ";
            for (auto b : a.TeleNums)
            {
                cout << b << " ";
            }
            cout << endl;
        }
        return 0;
    }

![这里写图片描述][70 1]

![这里写图片描述][70 2]  
判定错误格式的号码（不是11位数字），并使用ostringstream缓存号码串继而输出

#include"stdafx.h"
    #include<iostream>
    #include<fstream>
    #include<sstream>
    #include<string>
    #include<vector>
    #include "Sales_data.h"
    using namespace std;
    bool illegalnum (const string& num)
    {
        if (num.size() == 11)return false;
        return true;
    }
    struct PersonInfo {
        string name;
        vector<string> TeleNums;
    };
    int main(int argc, char **argv) {
       //argc是命令行参数的个数，argv是字符二级指针，可指向一个字符串参数
        const string inputfilelocal= "C:\\Users\\dell\\Desktop\\phones.txt";
        ifstream in(inputfilelocal);
        vector<PersonInfo> people;
        string line,word;
        istringstream record;
        while (getline(in, line))
        {
            PersonInfo info;
            record.str(line);
            record >> info.name;
            while (record >> word)
            {
                info.TeleNums.push_back(word);
            }
            people.push_back(info);
            record.clear();
        }
        for (const auto &entry : people)
        {
            ostringstream formatted, badnums;
            for (const auto &nums : entry.TeleNums)
            {
                if (illegalnum(nums))//处理错误格式号码
                {
                    //badnums<<" "<<nums;
                    badnums.str(badnums.str().append(" " + nums));
                }
                else
                {
                    formatted << " " << nums;
                }
            }
            if (!badnums.str().empty())
            {
       //显示错误的号码
                cerr << entry.name << " 有不符合规范的号码:" << badnums.str() << endl;
            }
            else 
            {
                cout << entry.name << formatted.str() << endl;
            }
        }
        return 0;
    }

![这里写图片描述][70 3]

[70]: /images/20220521/7f049c76bafd4431841363c42ff5c3aa.png
[70 1]: /images/20220521/e223f2688717431d9aac88bbdfe4d024.png
[70 2]: /images/20220521/877799f6292e491a879d75f90fc48452.png
[70 3]: /images/20220521/6eb47059247a46528d3cda0b0106ec69.png