对象的简单使用

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对象的使用

对象指针：

当定义对象指针后，可以利用对象指针访问其指向的对象的公有成员，语法形式:

对象指针->公有成员；

对象引用：

Student stu(1,”wang”,’M’);

Student rstu=stu;

This指针

它是一种特殊的指针，它指向员函数当前操作的数据所属对象。

对象数组：

普通对象做函数参数：

与普通变量做函数参数一样。

例子：

#include<iostream>
#include<cstring>
using namespace std;
class Student{
	public:
		Student(int pId,char* pName,char pSex);
		int getId(){
			return id;
		}
		char* getName(){
			return name;
		}
		char getSex(){
			return sex;
		}
		private:
	//	public:
			int id;
			char* name;
			char sex;
};
Student::Student(int pId,char* pName,char pSex)
{
	id=pId;
	name=new char[strlen(pName)+1];
	if(name!=0)
	strcpy(name,pName);
	sex=pSex;
}
class Admin{
	public:
		Admin(int pId);
		void printStudent(Student stu);
		private:
			int id;
};
Admin::Admin(int pId)
{
	id=pId;
}
void Admin::printStudent(Student stu)
{
	cout<<"The student information is: "<<"id: "<<stu.getId()<<","<<"name: "<<stu.getName()<<","<<"sex: "<<stu.getSex()<<endl;
	//	cout<<"The student information is: "<<"id: "<<stu.id<<","<<"name: "<<stu.name<<","<<"sex: "<<stu.sex<<endl;

}
int main()
{
	Student stu(1,"wang",'M');
	Admin admin(11);//为什么？ 
	admin.printStudent(stu);
	return 0;
}

对象指针做函数参数：

与普通变量指针做函数参数的用法一样。

#include<iostream>
#include<cstring>
using namespace std;
class Student{
	public:
		Student(int pId,char* pName,char pSex);
			int getId(){
			return id;
		}
		char* getName(){
			return name;
		}
		char getSex(){
			return sex;
		}
		void setId(int pId)
		{
			id=pId;
		}
		void setName(char* pName)
		{
			name=new char[strlen(pName)+1];
			if(name!=0)
			strcpy(name,pName);
		}
		void setSex(char pSex){sex=pSex;}
		private:
	//	public:
			int id;
			char* name;
			char sex;
};
Student::Student(int pId,char* pName,char pSex)
{
	id=pId;
	name=new char[strlen(pName)+1];
	if(name!=0)
	strcpy(name,pName);
	sex=pSex;
}
class Admin{
	public:
		Admin(int pId);
		void printStudent(Student stu);
		void updateStudent(Student* pStu,int pId);
		void updateStudent(Student* pStu,char* pName);
		void updateStudent(Student* pStu,char pSex);
		private:
			int id;
};
Admin::Admin(int pId)
{
	id=pId;
}
void Admin::printStudent(Student stu)
{
		cout<<"The student information is: "<<"id: "<<stu.getId()<<","<<"name: "<<stu.getName()<<","<<"sex: "<<stu.getSex()<<endl;
}
void Admin::updateStudent(Student* pStu,int pId)
{
	pStu->setId(pId);
}
void Admin::updateStudent(Student* pStu,char* pName)
{
	pStu->setName(pName);
}
void Admin::updateStudent(Student* pStu,char pSex)
{
	pStu->setSex(pSex);
}
int main()
{
	Student stu(1,"wang",'M');
	Admin admin(91);
	admin.printStudent(stu);
	Student* pStu=&stu;
	admin.updateStudent(pStu,99);
	admin.printStudent(stu);
	admin.updateStudent(pStu,"zhao");
	admin.printStudent(stu);
	admin.updateStudent(pStu,'F');
	admin.printStudent(stu);
	return 0;
}

对象引用做函数参数

与普通变量做函数参数的用法一样。

对象的简单使用

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原文地址：http://blog.csdn.net/l15738519366/article/details/51333203