软件设计实验18

实验18：迭代器模式

[实验任务一]：JAVA和C++常见数据结构迭代器的使用

信1305班共44名同学，每名同学都有姓名，学号和年龄等属性，分别使用JAVA内置迭代器和C++中标准模板库（STL）实现对同学信息的遍历，要求按照学号从小到大和从大到小两种次序输出学生信息。

#include<iostream>
#include <vector>
using namespace std;
class Student{
public:
    long studentid;//学号
    string name;//名字
    int age;//年龄
    string major;//专业
public:
    Student(long studentid, string name, int age, string major) {//构造函数
        this->studentid = studentid;
        this->name = name;
        this->age = age;
        this->major = major;
    }
    void show(){//输出
        cout<<"姓名: "<<this->name<<". 学号: "<<this->studentid <<". 年龄: "<< this->age<< ". 专业: " << this->major<<endl;
    }
};
bool compMax(Student *a,Student *b){
    if (a->studentid> b->studentid)
        return true;
    else
        return false;
}
bool compMin(Student *a,Student *b){
    if (a->studentid< b->studentid)
        return true;
    else
        return false;
}
int main(){
    Student *s1 = new Student(20193250, "张雨轩", 19, "软件工程专业");
    Student *s2 = new Student(20193999, "李四", 30, "材料专业");
    Student *s3 = new Student(20196654, "王五", 29, "机械专业");
    Student *s4 = new Student(20193367, "赵六", 34, "工商管理专业");
    Student *s5 = new Student(20193396, "张三", 34, "土木专业");
    Student *s6 = new Student(20193396, "孙七", 34, "电气专业");
    vector<Student*> vec;
    vec.push_back(s1);
    vec.push_back(s2);
    vec.push_back(s3);
    vec.push_back(s4);
    vec.push_back(s5);
    vec.push_back(s6);
    cout<<"按照学号从大到小输出: "<<endl;
    vector<Student*>::iterator it;
    sort(vec.begin(), vec.end(),compMax);
    for(it=vec.begin();it!=vec.end();it++){
        (*it)->show();
    }
    cout<<"-----------------------------------------------------------------"<<endl;
    cout<<"按照学号从小到大输出: "<<endl;
    sort(vec.begin(), vec.end(),compMin);
    for(it=vec.begin();it!=vec.end();it++){
        (*it)->show();
    }
}