25.类，对象，成员实例

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第一种写法：
! e) m8 J) q9 V; U' h% i& B- e#include <iostream>
using namespace std;
/ m1 U2 f3 e* ^" t2 x7 v' e4 @( yclass Human
{
1 m) t) B& W+ `% m+ Q) ?public:
  o& S! [  I1 @  c, P3 R void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
( A2 s/ V7 _5 y# Vprivate:
4 _3 p# u4 R+ }, k- h. U int Height;
  m' H! \) F- r5 X" ? int Weight;
: l3 Z1 b7 o* Q, K; v};
8 ~9 h# Q1 q/ ]( ]0 Q5 V
0 z- h0 J) t& {' Tvoid main(void)
: j1 Q; O9 q' ]) Q{
   Human Lee;
  J0 F8 D! b7 |# O: p, a$ d* c   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
: k' T  q; ~! }0 k# S  `7 V& h/ [   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
! h1 C+ Z. O* U& g   Lee.GetWeight();
   cout<<endl;
}
第二种写法：
6 L/ \5 g9 ~9 u; k# V+ R; p  y#include <iostream>
using namespace std;
class Human
{
public:
) b# t$ y' \5 a void GetHeight();
    void GetWeight();
void SetHeight(int x);
" @+ D8 e6 K; q7 M void SetWeight(int y);
# {" W% H4 a, t' \* G! pprivate:
; {$ p: y; [! u6 w/ C int Height;
4 y$ v, O% Q" y6 F( \+ b  X int Weight;
};
1 @1 t  i* D) a9 C( u, T' Jvoid Human::SetHeight(int x)
{
- P) g7 K# m8 |: ~2 ~/ ] Height=x;
$ d8 s# V: a* D, `}
+ I* i$ Y* _& _, G& E! ?9 jvoid Human::GetHeight()
{
cout<<Height;
. C8 ?2 \' C, J4 o  E+ S5 v}
void Human::SetWeight(int y)
, B* p( l3 n7 \7 t* T$ Z{
1 c8 s8 b* H; N6 f5 Z# `- y Weight=y;
}
void Human::GetWeight()
{
cout<<Weight;
# f" v$ K/ o% |: k}
void main(void)
* j7 j# C. }6 Z( d{
   Human Lee;
   Lee.SetHeight(172);
% o5 |8 w6 ~) @' s$ F+ D1 R6 f   cout<<"Lee的身高是：";
; w/ N( J) g; h# l  H$ N   Lee.GetHeight();
% u1 R8 n' Y) j; v1 @5 r   cout<<endl;
   Lee.SetWeight(120);
' g9 j' p. J/ b, r- H4 Y8 V" p   cout<<"Lee的体重是：";
7 O1 L. e) p% T$ U. r$ |* r   Lee.GetWeight();
1 k4 ~2 G: D4 e* h0 b4 s   cout<<endl;
}
: ^2 K( j1 H0 ~推荐第二种写法
( o. o' s, t4 q5 k