C++】class类程序运行结果为空

Question

运行结果为空，麻烦各位uu帮忙看下原因，感谢🙇‍

/*程序运行结果为:
1321    samsung message send*/

//StudybarCommentBegin
#include<iostream>
#include<string.h>
using namespace std;
//#include <iostream.h>
class Telephone
{
protected :
    int number;
public:
    Telephone()
    {number=1234;}
    Telephone(int n)
    {number=n;}
    void showNumber()
    {cout<<"my phone number is: "<<number<<endl;}
    void call()
    {cout<<"the phone is calling \n";}
};
class Mobile:public Telephone
{
    char *type;
    int cost;
public:
    Mobile();
    Mobile(char *t,int c, int n);
    void message()
    {cout<<number<<"\t"<<type<<"\tmessage send\n ";}
    friend int operator<(Mobile &x1,Mobile &x2);
};

//StudybarCommentEnd


Mobile::Mobile(){}

Mobile::Mobile(char *t,int c, int n):Telephone(n)
{
    cost = c;
    strcpy(type,t);        
}

int operator<(Mobile &x1, Mobile &x2)
{
    int result(x1.number>x2.number?x2.number:x1.number);
    return result;
}


//StudybarCommentBegin
int main()
{
    Mobile m1;
    Mobile m2("samsung",3500,1321);
    if(m1<m2)
        m1.message();
    else
        m2.message();
}    

//StudybarCommentEnd

Answer 1

char *type; 并没有分配内存，
strcpy(type,t); 操作不晓得t复制到哪去了