实验2.cpp

用类实现学生的具体情况信息

//lab 2 constructor overloading and distructor 
#include<iostream.h>     
#include<iomanip.h>/*stew()*/
#include<string.h>/*strcpy()*/

class Student/*定义一个类*/
{
private:/*以下为私有变量*/
	char Name[15];
	float GPA;
	int MAN;
public:                   /*以下为公有变量*/
	Student();            /*构造函数的重载*/
	Student(char*);
	Student(char*,float,int);
	~Student();            /*析构函数*/
	void Showdata();       /*定义类的一个Showdata()函数*/
};
void FormatOutput();       /*定义一个格式化输出的函数*/
main()
{
	Student pupil_1;/*主函数中对构造函数的调用*/
	Student pupil_2("aaa");
	Student pupil_3("bbb",3.5,8.0);
	FormatOutput();/*主函数对格式化输出函数的调用*/
	pupil_1.Showdata();/*对类中定义的Showdata()这个函数的调用*/
	pupil_2.Showdata();
	pupil_3.Showdata();
	return 0;
}
void FormatOutput()/*对格式化输出函数的定义*/
{cout.setf(ios::showpoint);
cout.precision(2);
}
Student::Student()/*对类的构造函数重载的定义*/
{cout<<"\nConstructor initializing student record...";
 strcpy(Name,"*******");
 GPA=0.0;
 MAN=0;
}

Student::Student(char *name)/*对类的构造函数重载的定义*/
{cout<<"\nConstructor initializing student record...";
 strcpy(Name,name);
 GPA=0.0;
 MAN=0;
}

Student::Student(char *name,float grade,int man)/*对类的构造函数重载的定义*/
{cout<<"\nConstructor initializing student record...";
 strcpy(Name,name);
 GPA=grade;
 MAN=man;
}

Student::~Student()/*析构函数的定义*/
{cout<<"\n\nThe destructor function has run."<<endl;
}
void Student::Showdata()/*对Showdata()函数的定义*/
{cout<<"\n\nShow data...";
cout<<"\nStudent name:"<<Name;
cout<<"\nStudent GPA:"<<GPA;
cout<<"\nStudent MAN:"<<MAN;
}