25.类，对象，成员实例

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第一种写法：
#include <iostream>
- X2 z) D. F# ?8 Z2 u; q2 X7 C' n& nusing namespace std;
7 v( f3 v1 P- u* nclass Human
{
public:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
2 b- G4 v$ |! E6 k# E void SetWeight(int y){Weight=y;}
private:
; b# ]$ j$ H. b int Height;
5 R5 g! v3 f2 \) F, C int Weight;
};
( i. W! e9 |7 A  B( f) A4 a+ A$ ]
void main(void)
{
  P: s3 ]# y7 r% B   Human Lee;
   Lee.SetHeight(172);
0 n( ~& {6 T: C/ w7 K1 N7 o   cout<<"Lee的身高是：";
! ^, \/ y  U8 L& O1 R7 @( h   Lee.GetHeight();
( c% [% p* b  a/ _. w6 l% \1 E   cout<<endl;
   Lee.SetWeight(120);
0 c2 }( P; d" R$ h: p6 z4 ~. y  S   cout<<"Lee的体重是：";
   Lee.GetWeight();
* H" }, h8 ^/ d5 [   cout<<endl;
}
3 J0 j7 z6 h) q9 m% ~5 G7 F第二种写法：
6 M: P) c% t: z  ]#include <iostream>
using namespace std;
" P5 Q0 f# Z2 a: q9 D" H% a( m) Oclass Human
{
public:
4 H0 O/ k7 ~2 ~+ h& t' n void GetHeight();
) V% j0 t: G# x$ Q9 p; m2 Q) Z    void GetWeight();
# j: J3 T% }0 k8 u! n* U void SetHeight(int x);
0 H* Z( F7 k3 F0 @1 | void SetWeight(int y);
private:
7 p7 `- G. d& ]- @' S int Height;
, p) _' b  ]# b3 i  {8 t# g- T int Weight;
};
0 |! }0 _1 U, a6 j% qvoid Human::SetHeight(int x)
) {/ n$ y! J+ o2 I# C7 R+ h{
: v' t8 N* e3 l; o( N3 ~ Height=x;
9 V# }! \  a+ ]; D" d}
void Human::GetHeight()
{
cout<<Height;
}
void Human::SetWeight(int y)
{
% ~2 D! d6 w$ [+ c Weight=y;
: M3 y2 ~  p3 o: z}
. `* T. a. I3 @* r) M6 yvoid Human::GetWeight()
{
- J3 d' C" f2 ?& g cout<<Weight;
}
) J. y$ h* a6 C7 K) D* \$ yvoid main(void)
% U0 ^: `6 @1 T) i. a{
( u- i6 m( z) s- F& C# e   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
% C7 f/ t/ W. X. G! u5 ]0 |   Lee.GetHeight();
   cout<<endl;
8 Y1 E6 j- T4 Q( \9 e3 |" @   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
& w- V- O6 ~! z& k6 ^. l" F, F- `   cout<<endl;
}
  b1 o4 u" K0 @: K( {* Y. O3 G推荐第二种写法
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