案例描述：
实现步骤：
#include<iostream>
using namespace std;
#include<map>
#include<string>
#include<vector>
#include<ctime>
#define CEHUA 1
#define MEISHU 2
#define YANFA 3
//员工类
class Worker
{
public:
//无参构造
Worker(){}
//有参构造函数进行初始化赋值
Worker(string name,int salary,int department):name(name),salary(salary),department(department){}
//获取姓名
string getName() { return name; }
//设置姓名
void setName(string name) { this->name = name; }
//获取工资
int getSalary() { return salary; }
//设置工资
void setSalary(int salary) { this->salary = salary; }
//获取部门
int getDepartment() { return department; }
//设置部门
void setDepartment(int dp) { department = dp; }
string name; //员工姓名
int salary; //员工工资
int department;//部门
};
//随机分配部门和工资
void random(vector<Worker>& wV);
//打印输出
void print(vector<Worker>& wV);
//将十名员工放入vector容器中
void creatWorker(vector<Worker>& v)
{
string nameSeed = "ABCDEFGHIJ";
for (int i = 0; i < 10; i )
{
Worker w;
w.name = "员工";
w.name = nameSeed[i];
v.push_back(w);
}
random(v);
//print(v);
}
//随机分配部门和工资
void random(vector<Worker>& wV)
{
//随机给每名员工分配部门和工资
srand((unsigned int)time(NULL));
for (int i = 0; i < wV.size(); i )
{
int money = rand() % 10001 6000;
wV[i].setSalary(money);
int departID = rand() % 3 1;
wV[i].setDepartment(departID);
}
}
//VECTOR打印输出
void print(vector<Worker>& wV)
{
for (int i = 0; i < wV.size(); i )
{
if (wV[i].getDepartment() == CEHUA)
{
cout << "员工的姓名： " << wV[i].getName() << " t员工的工资： " << wV[i].getSalary() << " t员工的部门： 策划" << endl;
}
if (wV[i].getDepartment() == MEISHU)
{
cout << "员工的姓名： " << wV[i].getName() << " t员工的工资： " << wV[i].getSalary() << " t员工的部门： 美术" << endl;
}
if (wV[i].getDepartment() == YANFA)
{
cout << "员工的姓名： " << wV[i].getName() << " t员工的工资： " << wV[i].getSalary() << " t员工的部门： 研发" << endl;
}
}
}
//员工分组
void setGroup(vector<Worker>& v, multimap<int, Worker>& m)
{
//按照key值，即部门编号进行分组
for (vector<Worker>::iterator it = v.begin(); it != v.end(); it )
{
m.insert(make_pair((*it).department, *it));
}
}
//分别打印某个部门的人数
void showWorkerByGroup(multimap<int,Worker>& m)
{
cout << "策划部门; " << endl;
//查找map中某个key是否存在，存在就返回其迭代器------find()
multimap<int, Worker>::iterator pos = m.find(CEHUA);
//统计每个部门有几个人
int count = m.count(CEHUA);
int index = 0;
for (; pos != m.end() && index < count; index , pos )
{
cout << "姓名： " << (*pos).second.getName() << " 工资： " << (*pos).second.getSalary() << endl;
}
cout << "----------------------------" << endl;
cout << "nn美术部门： " << endl;
//查找map中某个key是否存在，存在就返回其迭代器------find()
pos = m.find(MEISHU);
//统计每个部门有几个人
count = m.count(MEISHU);
index = 0;
for (; pos != m.end() && index < count; index , pos )
{
cout << "姓名： " << (*pos).second.getName() << " 工资： " << (*pos).second.getSalary() << endl;
}
cout << "----------------------------" << endl;
cout << "nn研发部门： " << endl;
//查找map中某个key是否存在，存在就返回其迭代器------find()
pos = m.find(YANFA);
//统计每个部门有几个人
count = m.count(YANFA);
index = 0;
for (; pos != m.end() && index < count; index , pos )
{
cout << "姓名： " << (*pos).second.getName() << " 工资： " << (*pos).second.getSalary() << endl;
}
}
int main()
{
//1.创建员工
vector<Worker> v;
creatWorker(v);
//2.员工分组
multimap<int, Worker> m;
setGroup(v, m);
showWorkerByGroup(m);
system("pause");
return 0;
}
