程序代码：

#include<iostream>
#include <string>
#include <vector>
using namespace std;

struct faDan {
    string ID;                  //罚单ID
    string carID;             //车牌号
    string userName;     //车主名字
    string policyName;  //交警名字
};

void menu();
void select();
void deletes();
void insert();

vector<faDan> v;

int main()
{
    int n = 0;

    while (1) 
    {
        menu();

        cin >> n;

        switch (n)
        {
        case 0:
            break;
        case 1:
            select();
            break;
        case 2:
            deletes();
            break;
        case 3:
            insert();
            break;
        }
    }
}

void select() {
    cout << "请输入“罚单ID：" << endl;
    string ID;
    cin >> ID;

    //仅实现条件为罚单ID的查询功能，若需其它自己扩展
    for (auto it = v.begin(); it != v.end(); it++)
    {
        if (it->ID == ID)
        {
            cout << "查询结果" << endl;
            cout << it->ID << " "
                << it->carID << " "
                << it->userName << " "
                << it->policyName << " " << endl << endl;
        }
        else
        {
            cout << "NULL" << endl;
        }
    }
}

void deletes() {
    cout << "请输入“罚单ID：" << endl;
    string ID;
    cin >> ID;

    //仅实现条件为罚单ID的删除功能，若需其它自己扩展
    for (auto it = v.begin(); it != v.end(); ) 
    {
        if (it->ID == ID) 
        {
            it = v.erase(it);
        }
        else
            it++;
    }
}

void insert() {
    cout << "请输入“罚单ID”，“车牌号”，“车主名”，“交警名”以空格间隔：" << endl;
    faDan d;
    cin >> d.ID >> d.carID >> d.userName >> d.policyName;

    v.push_back(d);
    cout << "添加OK" << endl << endl;
}

void menu() {
    cout << "罚钱系统功能列表：" << endl;
    cout << "请选择：1.查询，2..删除，3.添加" << endl;
}