cpp: random

 

 

// RandomlySampled.h : 此文件包含 "RandomlySampled" 类。十个常用排序算法 C++ 11
// 2023年4月9日 涂聚文 Geovin Du edit.



#pragma once
#ifndef RANDOMLYSAMPLED_H 
#define RANDOMLYSAMPLED_H 

#include <iostream> 
#include <string> 
#include <vector> 
#include <memory> 
#include <iostream> 
#include <string> 
#include <ctime> 
#include <cstdlib> 
#include <list>




using namespace std;


namespace geovindu
{
    /**
    *@brief 指定字符组数组，指定抽取一个或几个
    *
    */
    class RandomlySampled
    {

    private:
        string bundles[3];
        const string choices[6];
        string random;

    public:

        RandomlySampled();

        string getBundles()
        {
            return bundles[3];
        }
        void setBundles(string b);

        vector<string> randomize();

        vector<string> randomize(int choiceNumber);

        vector<string> randomize(int choiceNumber, string choices[]);

        vector<string> randomizes(int choiceNumber, std::list<std::string> choices);
    };


    RandomlySampled::RandomlySampled()
        :choices{ "" }, bundles{ "" }
    {

    }
    /**
    * @brief 指定字符组数组，指定抽取一个或几个
    * 
    */
    vector<string> RandomlySampled::randomize()
    {
        srand(time(0));
        string choices[] = { "Broccoli", "SiboDu", "Kiwi", "Kale", "Toma","GeovinDu" };
        int number = size(choices);
        vector<string> random;
        for (int i = 0; i < 1; i++) //1是一个，3是三个，需要抽取的数量
        {
            random.push_back(choices[rand() % number]); //数组的个数
        }
        return random;
    }

    /**
    * @brief 指定字符组数组，指定抽取一个或几个
    * @param [int] 输入参数
    */
    vector<string> RandomlySampled::randomize(int choiceNumber)
    {
        srand(time(0));
        string choices[] = { "Broccoli", "SiboDu", "Kiwi", "Kale", "Toma","GeovinDu" };
        int number = size(choices);
        vector<string> random;
        for (int i = 0; i < choiceNumber; i++) //1是一个，3是三个，需要抽取的数量
        {
            random.push_back(choices[rand() % number]); //数组的个数
        }
        return random;
    }

    /**
    * @brief 指定字符组数组，指定抽取一个或几个
    * @param [int] 输入参数 指定抽取的几个个数
    * @param [string choices[]] 输入参数 字符串数组，需要从中抽取的数组
    */
    vector<string> RandomlySampled::randomize(int choiceNumber, string choices[])
    {
        srand(time(0));    

      
        int number = sizeof(choices);
        vector<string> random;
        for (int i = 0; i < choiceNumber; i++) //1是一个，3是三个，需要抽取的数量
        {
            random.push_back(choices[rand() % number]); //数组的个数
        }
        return random;
    }
    /**
    * @brief 指定字符组数组，指定抽取一个或几个
    * @param [int] 输入参数 指定抽取的几个个数
    * @param [list<string>] 输入参数 字符串数组，需要从中抽取的数组
    */
    vector<string> RandomlySampled::randomizes(int choiceNumber, std::list<std::string> choices)
    {
        srand(time(0));
        int number = choices.size(); 
        vector<string> random;
        for (int i = 0; i < choiceNumber; i++) //1是一个，3是三个，需要抽取的数量
        {
            std::list<std::string>::iterator du = choices.begin();
           // random.push_back(choices[rand() % number]); //数组的个数 
            //1 ok
            std::advance(du, rand() % number);
            string  ss = *du;
            //2 也可以
            //auto du1 = std::next(choices.begin(), rand() % number);
            //ss = *du1;

             random.push_back(ss);
        }
        return random;
    }
};


#endif

　　

 

/**
	 # @brief 抽取指定字符串数组的字符
	*/
	void Geovin::DisplayRomd()
	{
		srand(time(0));

		RandomlySampled bo;
		bo.randomize();
		//auto
	   	vector<string> randomResult = bo.randomize();
		for (const auto& result : randomResult) {
			cout << "中奖人姓名:" << result << endl;
		}
	}


	/**
	 * @brief 抽取指定字符串数组的字符	 
	 * @param [long] 输入参数  抽几个人中奖
	*/
	void Geovin::DisplayRomd(int number)
	{
		srand(time(0));
		std::list<std::string> choices = { "涂聚文","刘杰","江山","徐工","李四","王五","张三","赵二"};
		RandomlySampled bo;

		bo.randomizes(number,choices);
		//auto
		vector<string> randomResult = bo.randomizes(number,choices);
		for (const auto& result : randomResult) {
			cout <<"中奖人姓名:"<< result << endl;
		}
	}
	/**
	 * @brief 抽取指定字符串数组的字符
	 * @param [long] 输入参数  抽几个人中奖
	 * @param [list<string>] 输入参数 字符串数组，需要从中抽取的数组
	*/
	void Geovin::DisplayRomd(int number, std::list<std::string> choices)
	{
		srand(time(0));
		//std::list<std::string> choices = { "涂聚文","刘杰","江山","徐工","李四","王五","张三","赵二" };
		RandomlySampled bo;

		bo.randomizes(number, choices);
		//auto
		vector<string> randomResult = bo.randomizes(number, choices);
		for (const auto& result : randomResult) {
			cout << "中奖人姓名:" << result << endl;
		}
	}

　　

调用：

	//随机抽取字符串
	//geovin.DisplayRomd();

	//geovin.DisplayRomd(1);

	std::list<std::string> choices = { "涂聚文","刘杰","江山","徐工","李四","王五","张三","赵二" };
	geovin.DisplayRomd(1, choices);