25.类，对象，成员实例

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第一种写法：
' l# Y* \3 P4 _$ S2 w#include <iostream>
& O+ e1 O/ y. m2 _' W* _) c, Kusing namespace std;
+ j8 J( {6 {, W7 l* l/ K# `5 Bclass Human
4 X# J: l2 U9 }7 k! h% Y' l5 h* c0 }{
+ p0 [3 g; _' N$ cpublic:
3 E7 H. Z' A' t: P; u; T* H+ m void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
6 O% w6 ?0 [# D; K8 J void SetWeight(int y){Weight=y;}
private:
9 }5 m; W" A. r$ ^# a5 o3 R: k; C0 u int Height;
int Weight;
};
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' J4 B. `; X' lvoid main(void)
{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
; @6 F) k; `5 L. v   Lee.GetHeight();
( i; X; V* b& c7 V7 c, V  R+ M   cout<<endl;
   Lee.SetWeight(120);
! f( L6 F' G! {' _" S0 x* u3 [   cout<<"Lee的体重是：";
* o+ |% w$ S7 l* O8 f$ z+ V   Lee.GetWeight();
6 j. _8 \' Y  K; W! C2 V   cout<<endl;
}
第二种写法：
#include <iostream>
using namespace std;
% Q& ~/ a7 c& \- d" ^- W2 r, Iclass Human
, _, Y- T. Y: w4 D$ B, ]{
2 x. w9 J+ h7 M$ epublic:
' n, K6 U1 G# v9 P; k. w/ v void GetHeight();
    void GetWeight();
. @; g6 B7 a9 ^- n$ r5 M void SetHeight(int x);
& G' K. P! p  @7 H void SetWeight(int y);
private:
& ?* P' U8 v7 a) n$ j7 l int Height;
+ l* w9 k9 \9 _# g int Weight;
+ w- F, L' [# {8 H/ ^3 u};
8 [. \8 o8 ?- l, Qvoid Human::SetHeight(int x)
" m% F5 m+ s7 W8 R, |/ t$ O{
8 E! [) b8 v+ l) z. y. q' e Height=x;
}
1 @2 g) V' z  \void Human::GetHeight()
{
cout<<Height;
. o$ E( N8 H5 P4 Q3 H}
void Human::SetWeight(int y)
+ Y/ k$ N7 S; C0 |/ h# d0 D{
, k3 k$ T) P; Q9 F) P Weight=y;
}
void Human::GetWeight()
{
cout<<Weight;
- T0 o: ~- n1 o" l+ Y- w, B  W}
2 e; d5 Q/ l: S, _void main(void)
{
; @# h" a. H. S) D2 |4 e   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
) ^- {: K9 D5 k0 ?% x7 ?   Lee.GetHeight();
9 U3 u9 q& S8 T. H# v( M) r   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
% L: j( A/ ?4 Y5 w. r* q% C+ D   Lee.GetWeight();
2 k4 \/ E8 ^2 o8 F3 h   cout<<endl;
}
+ s; X/ p/ i- ~6 a5 n  T推荐第二种写法
' B2 [( t; W1 c8 t9 V. @. D/ ^
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