STLmultimap

1 案例描述

  • 公司今天招聘了10个员工(A、B、C、D、E、F、G、H、I、J),10名员工进入公司之后,需要指派员工在哪个部门工作;
  • 员工信息有:姓名、工资组成;部门分为:策划、美术、研发;
  • 随机给10名员工分配部门和工资;
  • 通过multimap进行信息的插入key(部门编号)和value(员工);
  • 分部门显示员工信息。

2 实现步骤

  1. 创建10名员工,放到vector中;
  2. 遍历vector容器,取出每个员工,进行随机分组;
  3. 分组后,将员工部门编号作为key,具体员工作为value,放入到multimap容器中;
  4. 分部门显示员工信息。
#include<iostream>
using namespace std;
#include<vector>
#include<string>
#include<map>
#include<ctime>

/*
- 公司今天招聘了10个员工(A、B、C、D、E、F、G、H、I、J),10名员工进入公司之后,需要指派员工在哪个部门工作;
- 员工信息有:姓名、工资组成;部门分为:策划、美术、研发;
- 随机给10名员工分配部门和工资;
- 通过multimap进行信息的插入key(部门编号)和value(员工);
- 分部门显示员工信息。
*/

//宏定义
#define CEHUA 0
#define MEISHU 1
#define YANFA 2

//员工类
class Worker
{
public:
  string m_Name;
  int m_Salary;
};

//创建员工
void createWorker(vector<Worker>&v)
{
  string nameSeed = "ABCDEFGHIJ";
  for (int i = 0; i < 10; i++)
  {
    Worker worker;
    worker.m_Name = "员工";
    worker.m_Name += nameSeed[i];

    worker.m_Salary = rand() % 10000 + 10000;  //10000~19999

    //将员工放入容器中
    v.push_back(worker);
  }
}

//员工分组
void setGroup(vector<Worker>&v, multimap<int, Worker>&m)
{
  for (vector<Worker>::iterator it = v.begin(); it != v.end(); it++)
  {
    //产生随机部门编号
    int deptId = rand() % 3;  //0 1 2

    //将员工插入到分组中:key为部门编号、value为具体员工
    m.insert(make_pair(deptId, *it));
  }
}

//分组显示员工
void showWorkerByGroup(multimap<int, Worker>&m)
{
  cout << "策划部门:" << endl;
  multimap<int, Worker>::iterator pos = m.find(CEHUA);
  int count = m.count(CEHUA);  //统计策划部门具体人数
  int index = 0;
  for (; pos != m.end() && index < count; pos++, index++)
  {
    cout << "姓名:" << pos->second.m_Name << "    工资:" << pos->second.m_Salary << endl;
  }

  cout << "-----------------------------" << endl;

  cout << "美术部门:" << endl;
  pos = m.find(MEISHU);
  count = m.count(MEISHU);  //统计策划部门具体人数
  index = 0;
  for (; pos != m.end() && index < count; pos++, index++)
  {
    cout << "姓名:" << pos->second.m_Name << "    工资:" << pos->second.m_Salary << endl;
  }

  cout << "-----------------------------" << endl;

  cout << "研发部门:" << endl;
  pos = m.find(YANFA);
  count = m.count(YANFA);  //统计策划部门具体人数
  index = 0;
  for (; pos != m.end() && index < count; pos++, index++)
  {
    cout << "姓名:" << pos->second.m_Name << "    工资:" << pos->second.m_Salary << endl;
  }
}

int main()
{
  srand((unsigned int)time(NULL));

  //1. 创建员工
  vector<Worker>vWorker;
  createWorker(vWorker);

  //测试
  //for (vector<Worker>::iterator it = vWorker.begin(); it != vWorker.end(); it++)
  //{
  //  cout << "姓名:" << it->m_Name << "    工资:" << it->m_Salary << endl;
  //}

  //2. 员工分组
  multimap<int, Worker>mWorker;
  setGroup(vWorker,mWorker);

  //3. 分组显示员工
  showWorkerByGroup(mWorker);

  system("pause");

  return 0;
}

结果

参考 https://blog.51cto.com/u_15178976/2787826

https://blog.csdn.net/qq_30372933/article/details/105114747

https://www.cnblogs.com/duxie/p/10928122.html

原文地址:https://www.cnblogs.com/Malphite/p/15781250.html