第三周任务1

#include <iostream>
 
using namespace std;
 
class Student     
{ 
public:    
    void set_data(int n, char *p,char s); 
    void display( ); 
private:  
    int num; 
    char name[20];
 char sex;
   
}; 
 
void Student::set_data(int n, char *p,char s) 
{ 
    num=n;  
    strcpy(name,p);  
    sex=s; 
}
 
void Student::display( )      
{ 
    cout<<"num: "<<num<<endl; 
    cout<<"name: " <<name<<endl;  
    cout<<"sex: " <<sex<<endl;    
}
 
int main() 
{ 
    Student stud1,stud2;
    stud1.set_data(1,"He",'f'); 
    stud2.set_data(2,"She",'m');
 stud1.display();
    stud2.display(); 
    return 0; 
} 

 

撞错：1：违反封装原则

 

1. int main()  
2. {  
3.     Student stud1,stud2;  
4.     num=1;  
5.     name[20]="he";  
6.     sex=f;  
7.     stud1.set_data(1,"He",'f');  
8.     stud2.set_data(2,"She",'m');  
9.     stud1.display();  
10.     stud2.display();  
11.     return 0;  
12. }  

error C2065: 'num' : undeclared identifier
C:\Documents and Settings\Administrator\桌面\4654.cpp(36) : error C2065: 'name' : undeclared identifier
C:\Documents and Settings\Administrator\桌面\4654.cpp(36) : error C2109: subscript requires array or pointer type
C:\Documents and Settings\Administrator\桌面\4654.cpp(36) : error C2440: '=' : cannot convert from 'char [3]' to 'int'
        This conversion requires a reinterpret_cast, a C-style cast or function-style cast
C:\Documents and Settings\Administrator\桌面\4654.cpp(37) : error C2065: 'sex' : undeclared identifier
C:\Documents and Settings\Administrator\桌面\4654.cpp(37) : error C2065: 'f' : undeclared identifier
执行 cl.exe 时出错.

4654.obj - 1 error(s), 0 warning(s)