25.类，对象，成员实例

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第一种写法：
3 [' N) G- O# Q5 L  J#include <iostream>
using namespace std;
class Human
3 B5 K9 r; r; l{
public:
void GetHeight(){cout<<Height;}
7 W/ @4 M3 L7 [4 N" s3 a% h void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
$ i7 ]  T8 M& r3 n) g+ M2 rprivate:
& r, V2 }- O5 ^, W( }0 k' L int Height;
/ m! P- ?8 i, |" ?- M int Weight;
& n& k! s* V/ g; U0 s};

! ~. Y6 x1 b0 C. k% Vvoid main(void)
+ o5 \# d" N' d, D% u3 M{
   Human Lee;
4 f$ T  {+ k, J! e. y0 C3 L$ ~   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
* N# r' w" b% Q) d# O   cout<<endl;
! `7 J, \' o7 Y, L, N   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
5 x# H+ V. g! m' q: _  o   cout<<endl;
}
* W; {' Q% K5 N7 {. M9 m# M: M8 V) s第二种写法：
#include <iostream>
using namespace std;
class Human
) Y, H& b9 P( Z+ S+ s7 M{
public:
void GetHeight();
9 d5 c: ~4 \1 }  c8 u    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
; p; M) g, h, }; }private:
/ ?. W: a# O0 q! \# j int Height;
% f5 o& T- C& d4 W" L int Weight;
# a0 k7 W: j6 k$ T1 G3 y. V};
3 {) Q# l) ^2 q6 T6 g9 ?void Human::SetHeight(int x)
{
Height=x;
' _* P& ~0 ?2 |& Y+ O) S: P- y$ A# L. J& N8 `}
- Y% k! c) ]5 u1 uvoid Human::GetHeight()
{
cout<<Height;
}
void Human::SetWeight(int y)
* S% g- ]" v3 Z{
+ f4 X4 x( R/ M, h) ~, Y Weight=y;
}
void Human::GetWeight()
% t1 o+ Z! C2 e) l8 E  X2 j! Q3 D{
cout<<Weight;
. @+ }0 u! z) _}
7 H2 V7 V( Z$ s5 ?: C2 Y# {void main(void)
{
   Human Lee;
   Lee.SetHeight(172);
7 u8 u6 M7 m% X1 V   cout<<"Lee的身高是：";
% I8 S4 V! L( X9 F8 X* ~6 y' e0 V   Lee.GetHeight();
   cout<<endl;
% u0 ^) d7 I* _! f% ]* ~( ~8 [   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
$ u$ u4 y6 x6 c}
1 S6 G& S( Z7 o, T; v' R" g$ q推荐第二种写法

2 Y* j3 X: l, A9 e  G/ f6 k) h
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