用構造函數的話第46行這里要怎么寫
#include <iostream>
#include <string>
using namespace std;
/**
?* 定義類：Student
?* 數據成員：m_strName
?* 無參構造函數：Student()
?* 有參構造函數：Student(string _name)
?* 拷貝構造函數：Student(const Student& stu)
?* 析構函數：~Student()
?* 數據成員函數：setName(string _name)、getName()
?*/
class Student
{public:
? Student()
{? m_strName="";
??
}
? Student(string name):m_strName(name)
? {
??
? }
? Student(const Student& stu)
? {
??
? }
? ~Student(){};
? ?void setName(string name)
? {m_strName= name;
? }
?string getName()
? {return m_strName;
??
? }
private:
? string m_strName;
??
};
int main(void)
{
? ? // 通過new方式實例化對象*stu
? ? Student *stu=new Student();
? ? // 更改對象的數據;成員為“慕課網”
?new Student("muke");
? ? // 打印對象的數據成員
cout<<stu->getName()<<endl;
delete stu;
stu= NULL;
return 0;
}
2018-09-19
#include?<iostream> #include?<string> using?namespace?std; /** ?*?定義類：Student ?*?數據成員：m_strName ?*?無參構造函數：Student() ?*?有參構造函數：Student(string?_name) ?*?拷貝構造函數：Student(const?Student&?stu) ?*?析構函數：~Student() ?*?數據成員函數：setName(string?_name)、getName() ?*/ class?Student{ ????public: ????Student(); ????Student(string?_name); ????Student(const?Student?&stu); ????~Student(); ????void?setName(string?_name); ????string?getName(); ???? ????string?m_strName; }; Student::Student(){ ????cout?<<?"no?argument"?<<?endl; } Student::Student(string?_name):m_strName(_name){ ????cout?<<?"one?argument"?<<?endl; } Student::Student(const?Student?&stu){ ????cout?<<?"copy?constructor"?<<?endl; } Student::~Student(){ ????cout?<<?"~?fun"?<<?endl; } void?Student::setName(string?_name){ ????m_strName?=?_name; } string?Student::getName(){ ????return?m_strName; } int?main(void) { ????//?通過new方式實例化對象*stu ????Student?*stu?=?new?Student("111"); ????//?更改對象的數據成員為“慕課網” ????cout?<<?stu->m_strName?<<?endl; ????stu->m_strName="慕課網0"; ????//?打印對象的數據成員 ????cout?<<?stu->m_strName?<<?endl; ????stu->setName("慕課網1"); ????cout?<<?stu->getName()?<<?endl; ????delete?stu; ????Student?stu1("慕課網2"); ????cout?<<?stu1.getName()?<<?endl; ????Student?stu2(stu1); ???? ????return?0; }2018-09-01
#include?<iostream> #include?<string> using?namespace?std; /** ?*?定義類：Student ?*?數據成員：m_strName ?*?無參構造函數：Student() ?*?有參構造函數：Student(string?_name) ?*?拷貝構造函數：Student(const?Student&?stu) ?*?析構函數：~Student() ?*?數據成員函數：setName(string?_name)、getName() ?*/ class?Student?{ public: ????Student()?; ????Student(string?_name); ????Student(const?Student&stu); ????~Student(); ????void?setName(string?_name){ ?????????m_strName=_name; ????} ????string?getName(){ ????????return?m_strName; ????} private: ?????string??m_strName; }; int?main(void) { ????//?通過new方式實例化對象*stu ????Student?*stu?=?new?Student(); ????//?更改對象的數據成員為“慕課網” ????stu->setName("慕課網"); ????//?打印對象的數據成員 ????cout<<stu->getName()<<endl; ????delete?stu; ????stu?=NULL; ????return?0; } Student::Student(){ ????cout<<"Student()"<<endl; } Student::Student(string?_name){ cout<<"Student(string?_name)"<<endl; } Student::Student(const?Student&?stu){ ????cout<<"Student(const?Student&?stu"<<endl; } Student::~Student()?{ ????cout<<"~Student()"<<endl; }