#include<iostream>
#include<string>
using namespace std；
 
class Student
{
protected:
    string name;
    char matric_no[15];
    int status;

public:
    Student()
    {
        cout<<"Calling constructor from the"<<"base class"<<endl;
    }

    void SetData()
    {
        cout<<"Enter name:";
        cin<<name;
        cout<<"Enter matric number:";
        cin<<matric_no;
    }

    virtual void DisplayFees(){};
};

class PartTimeStudent:public Student
{
public:
    PartTimeStudent();
    void DisplayFees();
};

PartTimeStudent::PartTimeStudent()
{
    cout<<"Entering constructor for class"<<"Part Time Student."<<endl;
}

void PartTimeStudent::DisplayFees()
{
    cout<<"Hi,"<<name<<"!";
    cout<<"Your fees is RM300. Thank you."<<endl;
}

class FullTimeStudent:public Student
{
public:
    FullTimeStudent();
    void DisplayFees();
};

FullTimeStudent::FullTimeStudent()
{
    cout<<"Entering constructor for class"<<"Full Time Student."<<endl;
}

void FullTimeStudent::DisplayFees()
{
    cout<<"Hello,"<<name<<"!";
    cout<<"Your fees is RM200. Thank you."<<endl;
}

void main()
{
    FullTimeStudent full_timer;
    full_timer.SetData();
    full_timer.DisplayFees();

    PartTimeStudent part_timer;
    part_timer.SetData();
    part_timer.DisplayFees();
}

楼主要仔细呀，看清楚，头文件using namespace std; 这个分号有问题；
还有cin后面是>>不是<< .要仔细。。
下面程序都可以运行了:
#include<iostream>
#include<string>
using namespace std;

class Student
{
protected:
    string name;
    char matric_no[15];
    int status;

public:
    Student()
    {
        cout<<"Calling constructor from the"<<"base class"<<endl;
    }

    void SetData()
    {
        cout<<"Enter name:";
        cin>>name;
        cout<<"Enter matric number:";
        cin>>matric_no;
    }

    virtual void DisplayFees(){};
};

class PartTimeStudent:public Student
{
public:
    PartTimeStudent();
    void DisplayFees();
};

PartTimeStudent::PartTimeStudent()
{
    cout<<"Entering constructor for class"<<"Part Time Student."<<endl;
}

void PartTimeStudent::DisplayFees()
{
    cout<<"Hi,"<<name<<"!";
    cout<<"Your fees is RM300. Thank you."<<endl;
}

class FullTimeStudent:public Student
{
public:
    FullTimeStudent();
    void DisplayFees();
};

FullTimeStudent::FullTimeStudent()
{
    cout<<"Entering constructor for class"<<"Full Time Student."<<endl;
}

void FullTimeStudent::DisplayFees()
{
    cout<<"Hello,"<<name<<"!";
    cout<<"Your fees is RM200. Thank you."<<endl;
}

void main()
{
    FullTimeStudent full_timer;
    full_timer.SetData();
    full_timer.DisplayFees();

    PartTimeStudent part_timer;
    part_timer.SetData();
    part_timer.DisplayFees();
}

运行：
--------------------Configuration: string - Win32 Debug--------------------
Linking...

string.exe - 0 error(s), 0 warning(s)