看板Programming
标 题请教常数建构子
发信站无名小站 (Wed Sep 12 01:41:42 2007)
转信站ptt!ctu-reader!ctu-gate!news.nctu!newsfeed.nthu!news.cs.nthu!csnews.cs
请问将建构子宣告为常数，这在程式上有何不同的地方呢？
#include <iostream>
using namespace std;
class people
{
private:
int *height;
public:
void display();
people(const int *);
~people(){};
};
people:: people(const int *ht)
{ int *pt_temp=new int(*ht);
height=pt_temp;
}
void people::display()
{cout<<"高"<<*height<<"address" <<height<<endl;
}
int main()
{
int *hptr=new int(120);
people *Hobbit=new people(hptr);
cout << "Hobbit is";
Hobbit->display();
people *abcde=new people(hptr);
cout << "abcde is";
abcde-> display();
delete hptr;
system("PAUSE");
return 0;}
--
参考一下..
http://members.lycos.co.uk/jiannrong/sell.htm
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1F：推 WPC001:表示不会去动到该指标指向的内容(readonly) 61.64.209.71 09/12 11:17
2F：推 avhacker:建构子并没有被宣告为 const 140.123.19.235 09/12 12:45
3F：→ avhacker:是建构子的参数被宣告为 const 140.123.19.235 09/12 12:45