sos，一道c++编程题 - 编程论坛

#2

laoyang1032010-11-27 14:02

Teacher_Cadre(int wage=0){}
初始化列表初始化列表怎么全是这个问题啊......

#3

淑人公子2010-11-27 16:09

谢谢，终于成功了，这个动态分配的对了不知道那个数组为什么不对

#4

laoyang1032010-11-27 18:00

你传递参数如果是数组的话难道你要把数组中所有的元素都作为参数吗？

所以只要传递一个首地址就可以啦

#5

shi198719872010-11-27 19:49

这个有bug程序想要表达的意思是什么，没表达有意义的结果。

#6

shi198719872010-11-27 20:15

#include<iostream>
using namespace std;
class Teacher
{
private:
    char *name;
    int age;
    char *title;
public:
    Teacher(char *name=0,int age=0,char *title=0)
    {    }
    void get()
    {
        name=new char[10];
        title=new char[10];
        cout<<"input name:"<<endl;
        cin>>name;
        cout<<"input age:"<<endl;
        cin>>age;
        cout<<"input title:"<<endl;
        cin>>title;
    };
    ~Teacher()
    {
        delete[] name;delete[] title;
    }
    void display()
    {
        cout<<"the name is:"<<name<<endl;
        cout<<"the age is:"<<age<<endl;
        cout<<"the title is:"<<title<<endl;
    }

};
class Cadre{
public:
    Cadre(char *name=0,int age=0,char *post=0)
    {    }
   void get()
    {
        name=new char[10];
        post=new char[10];
        cout<<"input name:"<<endl;
        cin>>name;
        cout<<"input age:"<<endl;
        cin>>age;
        cout<<"input postion:"<<endl;
        cin>>post;
    }
    ~Cadre(){delete[] name;delete[] post;}
    void display()
    {
     cout<<"the post is"<<post<<endl;
    }
private:
    char *name;
    int age;
    char *post;
};
class Teacher_Cadre:public Teacher,public Cadre
{
   private:
    int wage;
   public:
  Teacher_Cadre(int wage=0)
    {    }
    void show()
    {
    Teacher::display();
    }
   void getwage()
    {
    cout<<"input wage:"<<endl;
    cin>>wage;
    }
    void put()
    {
    cout<<"the wage is"<<wage<<endl;
    cout<<"the post is"<<endl;
      Cadre::display();
    }
};
int main()
{
Teacher_Cadre tc;
Teacher t1;
t1.get();
Cadre c1;
c1.get();
tc.getwage();
tc.Teacher::get();
tc.Cadre::get();
tc.show();
tc.put();
}
tc.show()没有初始化，增加初始化即可。而且，这段代码很混乱，建议LZ不要这种方法写。

#7

woshiniulei2010-11-27 21:22

kj

#8

gongzeyang2010-11-28 10:26

有点专业

#9

淑人公子2010-11-28 15:41

#include<iostream>
using namespace std;
class Teacher{
private:
    char *name;
    int age;
    char *title;
public:
    Teacher(char *name=0,int age=0,char *title=0){
        name=new char[10];
        title=new char[10];
        }
    void get(){
    cout<<"input name"<<endl;
    cin>>name;
    cout<<"input age"<<endl;
    cin>>age;
    cout<<"input title"<<endl;
    cin>>title;
    };
    ~Teacher(){delete[] name;delete[] title;}
    void display(){
     cout<<"the name is"<<name<<endl;
     cout<<"the age is"<<age<<endl;
     cout<<"the title is"<<title<<endl;
    }

};
class Cadre{
public:
    Cadre(char *name=0,int age=0,char *post=0){
        name=new char[10];
        post=new char[10];   }
    get(){
     cout<<"input name"<<endl;
    cin>>name;
    cout<<"input age"<<endl;
    cin>>age;
    cout<<"input post"<<endl;
    cin>>post;
    }
    ~Cadre(){delete[] name;delete[] post;}
    display(){
     cout<<"the post is"<<post<<endl;
    }
private:
    char *name;
    int age;
    char *post;
};
class Teacher_Cadre:public Teacher,public Cadre{
private:
    int wage;
public:
    Teacher_Cadre(int wage=0,char *name=0,int b=0,char *post=0,char *title=0):Teacher(name,b,title),Cadre(name,b,post){}
    void show(){
    Teacher::display();
    }
    getwage(){
    cout<<"input wage"<<endl;
    cin>>wage;
    }
    put(){
    cout<<"the wage is"<<wage<<endl;
    cout<<"the post is"<<endl;
      Cadre::display();
    }
};
main(){
Teacher_Cadre tc;
tc.Teacher::get();
tc.show();
tc.Cadre::get();
tc.getwage();
  tc.put();
}
这样错了但是像上面那样把name=new char[10];title=new char[10];写在get的函数体中就对了，是不是在构造函数中把name指向0了就不能再开辟空间了？

#10

淑人公子2010-11-28 18:06

因为形参名字与数据成员的名字相同了，如果改成 Teacher(char *name=0,int age=0,char *title=0){this->name=new char[10];就对了，可是系统都不看形参名为什么还不能和数据成员的名字相同