مشكل اين كد چيه؟

کد:

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#include <iostream>
#include <map>
#include <string>

using namespace std;
class Student
{
public:
    Student();
    Student(const string &,const int &);
    Student(const Student &);
    Student & operator = (const Student &);
    void SetName(string str);
    void SetAge(int age);
    string GetName() const ;
    int GetAge() const;
private:
    int itsAge;
    string itsName;
};
Student::Student():
itsName("new student"),
itsAge(16)
{}
Student::Student(const string & str,const int & ci):
itsName(str),
itsAge(ci)
{}
Student::Student(const Student & rhs):
itsName(rhs.GetName()),
itsAge(rhs.GetAge())
{}
Student & Student::operator =(const Student & rhs)
{
    itsAge = rhs.GetAge();
    itsName = rhs.GetName();
    return * this;
}
void Student::SetAge(int age)
{
    itsAge = age;
}
void Student::SetName(string str)
{
    itsName = str;
}
int Student::GetAge() const
{
    return itsAge;
}
string Student::GetName() const
{
    return itsName();
}

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

template <class T,class A>
void ShowMap(const map<T,A> &);

int main()
{
    Student Mahdi("Mahdi",16);
    Student Abolfazl("Abolfazl",14);
    Student Bird("bird",12);
    Student Mohammad("Mohammad",17);

    map<string,Student> MathClass;
    MathClass[Mahdi.GetName()] = Mahdi;
    MathClass[Abolfazl.GetName()] = Abolfazl;
    MathClass[Bird.GetName()] = Bird;
    MathClass[Mohammad.GetName()] = Mohammad;

    ShowMap(MathClass);
    cout <<MathClass["Mahdi"].GetName()<<" is "<<MathClass["Mahdi"].GetAge()
        <<" years old\n";
    return 0;
}
template <class T,classA>
void ShowMap(const map<T,A> & alk)
{
    for(map<T,A>::const_iterator ci = alk.begin();
    ci != alk.end; ++ci)
        cout <<ci->first<<" : "<<ci->second;
    cout <<endl;
}

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این کد قراره چکار کنه؟
ارور داره یا کارش رو درست انجام نمی ده؟
اگر ارور داره چه اروری می ده؟

دوست عزیز،
من برنامه شما را به صورت زیر تغییر دادم و در
BDS 2006
اجرا شد باید در
Visual C++
هم اجرا شود. اگر استاندارد نوشته نشده به علت کپی کردن در این وبسایت است.

کد:

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#include<conio.h>
#include<iostream>
#include<map>
#include<string>
 
usingnamespace std;
class Student
{
public:
Student(): itsName("new student"), itsAge(16)
{}
Student(const string & str,constint & ci): itsName(str), itsAge(ci)
{}
Student(const Student & rhs):itsName(rhs.GetName()),itsAge(rhs.GetAge())
{}
Student & operator = (const Student & rhs)
{
itsAge = rhs.GetAge();
itsName = rhs.GetName();
return * this;
}
void SetName(string str)
{
itsName = str;
}
void SetAge(int age)
{
itsAge = age;
}
string GetName() const
{
return itsName;
}
int GetAge() const
{
return itsAge;
}
 
private:
int itsAge;
string itsName;
};
 
ostream & operator << (ostream & os,Student & st)
{
os <<st.GetName()<<" is "<<st.GetAge()<<" years old\n";
return os;
}
template <class T,class A>
void ShowMap(const map<T,A> & alk)
{
 
for(map<T,A>::const_iterator ci = alk.begin();ci != alk.end(); ++ci)
{
Student stu = ci->second;
cout << ci->first <<" : "<< stu;
}
cout <<endl;
}
void main()
{
Student Mahdi("Mahdi",16);
Student Abolfazl("Abolfazl",14);
Student Bird("bird",12);
Student Mohammad("Mohammad",17);
map<string,Student> MathClass;
MathClass[Mahdi.GetName()] = Mahdi;
MathClass[Abolfazl.GetName()] = Abolfazl;
MathClass[Bird.GetName()] = Bird;
MathClass[Mohammad.GetName()] = Mohammad;
ShowMap(MathClass);
cout <<MathClass["Mahdi"].GetName()<<" is "<<MathClass["Mahdi"].GetAge()
<<" years old\n";
_getch();
}

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