构造函数的调用

 1 #include<iostream>
 2 #include<cstring>
 3 using namespace std;
 4 class Person
 5 {
 6     static const unsigned LIMIT = 25;//忘了加unsigned 
 7     string lname;
 8     char fname[LIMIT];
 9     public:
10 
11             Person()
12             {
13                 lname = "";
14                 fname[0] = ‘\0‘;
15             };
16             Person(const string ln,const char *fn = "Heyyou");
17             void Show() const
18             {
19                 cout << fname << ‘ ‘ << lname << endl;
20             };
21             void Formalshow() const
22             {
23                 cout << lname << ", " << fname << endl;    
24             };
25 /*            Person(const string ln, const char *fn)
26             {
27                 lname = ln;
28                 strcpy(fname,fn);
29             }
30 */
31 //不能使用上面这一段，会发生重载，把它提出来函数头加上classname::就好了 
32 };
33 Person::Person(const string ln, const char *fn)
34     {
35         lname = ln;
36         strcpy(fname,fn);
37     }
38 
39 int main()
40 {
41     Person one;
42     Person two("smythecraft");
43     Person three("Dimwiddy","Sam");
44     one.Show();
45     one.Formalshow();
46     cout<<endl;
47     
48     two.Show();
49     two.Formalshow();
50     cout<<endl;
51     
52     three.Show();
53     three.Formalshow();
54     cout<<endl;
55 }