C++实验——对高算用户排序

谁借莪１个温暖的怀抱￠ 2022-03-18 06:26 62阅读 0赞

# **实验目的：** #

1.  **练习面向对象编程；**
2.  **练习STL中deque容器的使用；**
3.  **能根据要求实现相应的功能。**

# 实验说明：  #

1.  **某某大学高性能运算需要统计年计算量，按core／小时收费 。**       ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0F0dGVudGlvbl8w_size_16_color_FFFFFF_t_70][]

# **实验要求： ** #

1.  **找出使用时间 <24****小时的用户，删除掉该记录，输出最终排序后结果。**

# ** 实验材料：** #

*  **说明：将下面数据复制到新建一个txt文档命名为core\_time.txt文件中，文件放到D盘下。**

wrb   	3242309.689
    luhg   	2346727.028
    tianxx   	1749160.207
    yuewenmu   	1231745.881
    lisidian   	1142826.668
    wyb   	417411.4575
    demouser   	274168.7461
    xlt   	269970.7442
    yangjing   	87924.22444
    zhangt   	36579.69889
    lihua   	33894.58556
    wbt11129   	17018.47056
    jhadmin   	12175.30472
    wrxue   	4879.451389
    yangxingli  	2627.677778
    yangwn   	1249.143333
    fanglichao  	715.4583333
    genghj   	627.3577778
    caoguojin   	626.5616667
    wanglaoshi  	398.1883333
    jhtest3   	66.17944444
    htli   	52.16222222
    lvlaoshi   	43.76555556
    lilaoshi   	11.53333333
    hpc_c1   	9.558611111
    wangwei   	2.447222222
    root   	1.425277778
    hongtongtong	0.498055556
    zhanglei   	0.292777778
    zhangpengfei	0.166666667
    wangruibo   	0.138888889
    caofy   	0.039444444
    hrl   	0.02
    wangy   	0.001111111
    cuiziheng   	0

# 实验代码： #

#include <iostream>
    #include <deque>
    #include <string>
    #include <fstream>
    #include <iterator>
    #include <algorithm>
    
    using namespace std;
    
    class User;
    ostream& operator<<(ostream& os,User& U);
    
    class User  //用户类
    {
    public:
        string Name;
        double Time;
    public:
        User(string name,double time):Name(name),Time(time){}
        string GetName()
        {
            return Name;
        }
        double GetTime()
        {
            return Time;
        }
    };
    
    class Print:public unary_function<User,void>   //打印的函数对象
    {
    private:
        deque<User>deq_u;
    public:
        Print(deque<User>& u):deq_u(u){}
        void operator()(User& u)
        {
            cout << u << endl;
        }
    };
    ostream& operator<<(ostream& os,User& U)    //重载输出流
    {
        os << U.GetName() << "\t" << U.GetTime() << endl;
        return os;
    }
    istream& operator>>(istream& is,User& U)    //重载输入流
    {
        is >> U.Name >> U.Time;
        return is;
    }
    void test()
    {
        ifstream in;
        in.open("D:\\Score_time.txt");
        if(!in)
        {
            cout << "文件读入错误！" << endl;
        }
        User u(" ",0.0);
        deque<User>deq_u;
        int c = 0;      //用来计数有多少个符合要求的用户
        while(!in.eof())
        {
            in >> u;
            if(u.Time > 24.0)
            {
                deq_u.push_back(u);
            }
            c++;
        }
        for_each(deq_u.begin(),deq_u.end(),Print(deq_u));
        cout << deq_u.size() << "\t" << c << endl;
        //copy(deq_u.begin(),deq_u.end,ostream_iterator<User>(cout,"\t"));
        in.close();
    }
    int main()
    {
        test();
        return 0;
    }

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