簡單複習了一下C++的建構函式，其中注意函式過載與函式預設值設定，不要出現衝突。
關於C++的建構函式，

0.在物件例項化的時候預設進行呼叫（有且僅有一次）
1.建構函式沒有返回值
2.建構函式的名字必須和類（class）的名字相同
3.系統會預設新增一個為空的建構函式
4.可以自行新增含有引數的建構函式
5.建構函式可以進行過載

Teacher.h

#include<iostream>
#include<algorithm>

using namespace std;

class Teacher
{
    public:
        Teacher();
        Teacher( string
 
 name,int age =38);
        void set_strName( string name );
        string get_strName();
        void set_iAge( int age );
        int get_iAge(); 
    private:
        string m_strName;
        int m_iAge;
};

Teacher.cpp

#include<iostream>
#include<string>
#include"TEACHER.h"

using
 
 namespace std; 

Teacher::Teacher()
{
    m_strName = "hello";
    m_iAge = 5;
    cout << "Teacher() output" << endl; 
}

Teacher::Teacher(string name,int age )
{
    m_strName = name;
    m_iAge = age;
    cout << "Teacher( string name,int age ) output" << endl;
}

void Teacher::set_strName(string
 
 name){
    m_strName = name;
}

string Teacher::get_strName(){
    return m_strName;
}

void Teacher::set_iAge(int age){
    m_iAge = age;
}

int Teacher::get_iAge(){
    return m_iAge;
}

int main()
{
    Teacher t1;
    Teacher t2("xiaoming",10);
    Teacher t3("JIM");
    cout << t1.get_strName() << " " << t2.get_iAge() << " " << endl; 
    cout << t2.get_strName() << " " << t2.get_iAge() << " " << endl;
    cout << t3.get_strName() << " " << t3.get_iAge() << " " << endl; 
    return 0;
}