这一章节的内容大部分都是记忆接口。

随机数种子 rand
ctime

评委打分案例


class Person
{
public:
    Person(string n,int a)
    {
        this->name=n;
        score=a;
    }
    string name;
    int score;
};

void create(vector<Person>&v)
{
    string  nameseed="ABCDE";
    for(int i=0;i<5;i++)
    {
        string tempname="选手";
        tempname+=nameseed[i];
        int tempscore=0;
        Person p(tempname,tempscore);
        v.push_back(p);
    }
}

void setscore(vector<Person>&v)
{
    for(int i=0;i<v.size();i++)
    {
        deque<int>q;
        for(int j=0;j<10;j++)
        {
            int score=rand()%41+60;
            q.push_back(score);
        }
        sort(q.begin(),q.end());
        q.pop_front();q.pop_back();
        int sum=0;
        for(int j=0;j<8;j++)
        {
            sum+=q[j];
        }
        int avg=sum/8;
        v[i].score=avg;
    }
}


void test()
{
    vector<Person>v;
    create(v);
    setscore(v);
    for(int i=0;i<5;i++)
    {
        cout<<v[i].name<<"  "<<v[i].score<<endl;
    }

}







int main()
{
    srand((unsigned int)time(NULL));
    test();
    system("pause");
    return 0;
}


员工分组案例

#define CEHUA  0
#define MEISHU 1
#define YANFA  2

class worker
{
public:
    string name;
    int salary;
};

void create(vector<worker>&v)
{
    string nameseed= "ABCDEFGHIJ";
    for(int i=0;i<10;i++)
    {
        string name="员工";
        name+=nameseed[i];
        worker w;
        w.name=name;
        w.salary=rand()%10000+10000;
        v.push_back(w);
    }
}

void setGroup(vector<worker>&v,multimap<int,worker>&m)
{
    for(vector<worker>::iterator it=v.begin();it!=v.end();it++)
    {
        int depid=rand()%3;
        m.insert(make_pair(depid,*it));
    }
}


void showGroup(vector<worker>&v,multimap<int,worker>&m)
{
    cout << "策划部门：" << endl;
    multimap<int,worker>::iterator pos=m.find(CEHUA);
    int cnt=m.count(CEHUA);
    int index=0;
    for(;pos!=m.end()&&index<cnt;pos++,index++)
    {
        cout<<"姓名: "<<pos->second.name<<" 工资: "<<pos->second.salary<<endl;
    }
    cout << "----------------------" << endl;
    cout << "美术部门： " << endl;
    pos=m.find(MEISHU);
    cnt=m.count(MEISHU);
    index=0;
    for(;pos!=m.end()&&index<cnt;pos++,index++)
    {
        cout<<"姓名: "<<pos->second.name<<" 工资: "<<pos->second.salary<<endl;
    }
    cout << "----------------------" << endl;
    cout << "研发部门： " << endl;
    pos=m.find(YANFA);
    cnt=m.count(YANFA);
    index=0;
    for(;pos!=m.end()&&index<cnt;pos++,index++)
    {
        cout<<"姓名: "<<pos->second.name<<" 工资: "<<pos->second.salary<<endl;
    }
}



void test()
{
    vector<worker>v;
    create(v);
    multimap<int,worker>m;
    setGroup(v,m);
    showGroup(v,m);
}