25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
& q# G# @4 a* A* Z5 p; m" H4 A( }2 ]class Human
{
public:
1 I  [, G. J+ K( I void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
2 Z/ B$ y( R$ P. h void SetWeight(int y){Weight=y;}
private:
& G! Z1 d, P( ^# c& U8 l int Height;
% C( }  R# w+ B3 f$ r: I int Weight;
};

2 j( S+ f  L  F% f6 ?7 V: j  avoid main(void)
- P9 S2 H. I% n) i{
) H4 ^3 J+ G% Z6 N& _3 [8 S   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
}
* z" U$ U0 k# B- m" n- ]9 Y第二种写法：
#include <iostream>
# n! p, M; u: ~. g" |using namespace std;
' _+ P2 ~+ t; |7 w) Zclass Human
2 |* \- Z8 E) t: k) J4 C1 K{
" e9 L8 A" [. E3 ]; fpublic:
3 B9 s1 v4 l( F) z2 U# M* f% ^! K void GetHeight();
    void GetWeight();
) d7 z- O8 h# l+ Z1 M void SetHeight(int x);
: v6 i! p, A; S3 {( B void SetWeight(int y);
private:
int Height;
int Weight;
& ^2 |  X* i- h! g' {3 H};
void Human::SetHeight(int x)
6 }( r' C2 f8 f6 I{
Height=x;
3 M0 N8 c6 z2 }( {6 Q; K1 z( ~9 h9 Z}
" R8 O# U" v7 |. a. z- ivoid Human::GetHeight()
  ]  [; A9 H4 K! c1 K" N{
cout<<Height;
}
void Human::SetWeight(int y)
& G  k0 N) _) L{
Weight=y;
% o. k3 R7 f! @! D}
void Human::GetWeight()
$ r  l- s6 z2 r" W9 c* Q! i3 a{
cout<<Weight;
}
/ ?) X- T, \8 jvoid main(void)
, \* X1 ]. s4 r{
   Human Lee;
   Lee.SetHeight(172);
' z! r- g. _! I$ W9 a' E; ]   cout<<"Lee的身高是：";
- P4 z8 N1 V" A$ }! u   Lee.GetHeight();
  t1 c9 n6 a: h5 r/ v' z   cout<<endl;
7 _6 o! r$ A: ~+ d- }$ p$ `1 U# I   Lee.SetWeight(120);
/ R! A' s& _$ o& G+ P" l   cout<<"Lee的体重是：";
   Lee.GetWeight();
; R9 F& z! P3 F% {: \/ R( o8 D   cout<<endl;
# P; m3 ?% m0 J1 n}
推荐第二种写法
  U+ e, z7 m& Q& z7 r; G' U$ S
. `$ g8 f3 z" Z5 B
) ?) A! E9 R& `* p0 R! P