4elist1910.cpp

《21天学通C＋＋》附盘的原代码。书上的每个例子在这里都有相应的C语言程序。

#include <iostream>
#include <string>
#include <map>
using namespace std;

class Student
{
public:
	Student();
	Student(const string& name, const int age);
	Student(const Student& rhs);
	~Student();

	void	SetName(const string& name);
	string	GetName()	const;
	void	SetAge(const int age);
	int		GetAge()	const;

	Student& operator=(const Student& rhs);

private:
	string itsName;
	int itsAge;
};

Student::Student()
: itsName("New Student"), itsAge(16)
{}

Student::Student(const string& name, const int age)
: itsName(name), itsAge(age)
{}

Student::Student(const Student& rhs)
: itsName(rhs.GetName()), itsAge(rhs.GetAge())
{}

Student::~Student()
{}

void Student::SetName(const string& name)
{
	itsName = name;
}

string Student::GetName() const
{
	return itsName;
}

void Student::SetAge(const int age)
{
	itsAge = age;
}

int Student::GetAge() const
{
	return itsAge;
}

Student& Student::operator=(const Student& rhs)
{
	itsName = rhs.GetName();
	itsAge = rhs.GetAge();
	return *this;
}

ostream& operator<<(ostream& os, const Student& rhs)
{
	os << rhs.GetName() << " is " << rhs.GetAge() << " years old";
	return os;
}

template<class T, class A>
void ShowMap(const map<T, A>& v);    // display map properties

typedef map<string, Student>	SchoolClass;

int main()
{
	Student Harry("Harry", 18);
	Student Sally("Sally", 15);
	Student Bill("Bill", 17);
	Student Peter("Peter", 16);

	SchoolClass	MathClass;
	MathClass[Harry.GetName()] = Harry;
	MathClass[Sally.GetName()] = Sally;
	MathClass[Bill.GetName()] = Bill;
	MathClass[Peter.GetName()] = Peter;

	cout << "MathClass:\n";
	ShowMap(MathClass);

	cout << "We know that " << MathClass["Bill"].GetName()
		 << " is " << MathClass["Bill"].GetAge() << " years old\n";

	return 0;
}

//
// Display map properties
//
template<class T, class A>
void ShowMap(const map<T, A>& v)
{
	for (map<T, A>::const_iterator ci = v.begin();
					ci != v.end(); ++ci)
		cout << ci->first << ": " << ci->second << "\n";

	cout << endl;
}