一个小型学生成绩管理程序

王朝other·作者佚名  2006-01-09
窄屏简体版  字體: |||超大  

//小型学生成绩管理程序

#include

#include

// Declaration and definition of class base_Student

class base_Student

{

public:

base_Student(); //constructor

base_Student(base_Student&); //copy constructor

char* operator =(char Name1[]) //overload operator =

{

return Name1;

}

void Initial(void);

float ShowScore(void);

void Show(void);

private:

int ID;

char Name[20];

float Score;

};

//constructor

base_Student::base_Student()

{

ID=0;

Score=0;

}

//copy constructor

base_Student::base_Student(base_Student& Student1)

{

Student1.ID=ID;

strcpy(Student1.Name,Name);

Student1.Score=Score;

}

//initialize student's data

void base_Student::Initial(void)

{

cout<<"ID:";

cin>>ID;

cout<<"Name:";

cin>>Name;

cout<<"Score:";

cin>>Score;

}

//return student's score

float base_Student::ShowScore(void)

{

return Score;

}

//display student's information

void base_Student::Show(void)

{

cout<

cout<<"ID:"<

cout<<"Name:"<

cout<<"Score:"<

}

// Declaration and definition of class Student derived from class base_Student

class Student:public base_Student

{

friend class StudentManager; //definite StudentManager as friend class

public:

Student();

Student(Student&);

void ChangeOrder(int i){Order=i;};

int ShowOrder();

void Show(void);

private:

int Order;

};

//constructor

Student::Student()

{

Order=0;

}

//copy constructor

Student::Student(Student& Student1)

{

Student1.Order=Order;

}

//return Order

int Student::ShowOrder()

{

return Order;

}

//return student's information

void Student::Show()

{

base_Student::Show();

cout<<"Order:"<

}

// Declaration and definition of class StudentManager for student management

class StudentManager

{

public:

StudentManager();

void SetClassName(char*);

int SetSize(int i);

void Input(void);

float Average(void);

int Swap(Student&,Student&);

void SetOrder(void);

void SortAsOrder(void);

int Show(void);

private:

char* ClassName;

Student students[60];

int Size;

float Aver_Score;

};

StudentManager::StudentManager()

{

ClassName=NULL;

}

void StudentManager::SetClassName(char* newClassName)

{

ClassName=newClassName;

}

//set class size

int StudentManager::SetSize(int i)

{

Size=i;

return 0;

}

//input every student's information of the class

void StudentManager::Input(void)

{

int i;

cout<<"Please input students' information:"<

for(i=0;i

{

cout<

students[i].Initial();

students[i].Order=i+1;

}

}

//calculate average score of the class

float StudentManager::Average(void)

{

int i(0);

float sum(0.0);

for(i=0;i

sum+=students[i].ShowScore();

Aver_Score=sum/Size;

cout< return Aver_Score;} //swap two students's dataint StudentManager::Swap(Student& Student1,Student& Student2) { Student Temp; Temp=Student1; Student1=Student2; Student2=Temp; return 0;} //set student's order according to his scorevoid StudentManager::SetOrder(void) { int i(0),j(0); for(i=0;i for(j=i;j if(students[j].ShowScore()>students[i].ShowScore()) { students[i].ChangeOrder(j+1); students[j].ChangeOrder(i+1); }} //exchange student's position according to his scorevoid StudentManager::SortAsOrder(void) { int i; for(i=0;i Swap(students[i],students[students[i].ShowOrder()-1]);} //display the whole class's informationint StudentManager::Show() { int i; cout< for(i=0;i students[i].Show(); return 0;} //main entry of the programint main(void){ int n; char ClassName[10]; StudentManager stuManager; cout<<"Please input your class's name:"< cin>>ClassName; stuManager.SetClassName(ClassName); cout<<"How many students are there in your class?"< cin>>n; stuManager.SetSize(n); stuManager.Input(); stuManager.Average(); stuManager.SetOrder(); stuManager.Show(); stuManager.SortAsOrder(); cout< stuManager.Show(); return 0;}

 
 
 
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