请帮助，谢谢

#include <iostream.h>
#include < stdlib.h >
class Student
{
    int no ;
    char  name [20] ;
    int deg ;
    char cname [20] ;
public :
    Student () {}
    Student ( int n , char na [] , int d , char cn [] ) {}
    void disp () { }
    ~Student () { }
} ;
class body :  Student
{
    int English ;
    int Chinese ;
public :
    body () { }
    void deg ( int E , int C ) { }
    void disp () { }
    ~body () { }
} ;
void Student :: Student ( int n , char na  , int d , char cn  )
{
    no = n ;
    strcpy ( name , na ) ;
    deg = d ;
    strcpy ( cname , cn ) ;
    return  ;
}
void Student :: disp ()
{
    cout << " no " << no << " name " << name << " deg " << deg << " cname " << cname << endl ;
}
void body :: deg ( int E , int C )
{
    English = E ;
    Chinese = C ;
}
void body :: disp ()
{
    cout << " 总成绩 " << English + Chinese << endl ;
}
void main ( )
{
    body A ( 1 , " 李民航 " , 64 , 33 ) ;
    A. disp () ;
    body B ( 33 , 33 ) ;
    B.disp () ;
}找一下错误的原因