25.类，对象，成员实例

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第一种写法：
#include <iostream>
8 U# E8 t' A0 p& }using namespace std;
7 e) x. @/ n4 L9 ]& K% o' Uclass Human
{
; ?% p8 t; }. H% Zpublic:
8 k* O3 ?6 ?' T2 G4 V% s8 f void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
int Height;
. F2 V. ]8 v1 x7 l int Weight;
};
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void main(void)
{
( a7 X; G8 Z  M) I   Human Lee;
   Lee.SetHeight(172);
, [7 a( l5 U: b   cout<<"Lee的身高是：";
9 t: a& h7 W" G  s( m   Lee.GetHeight();
   cout<<endl;
, Q  d% s3 L5 u/ B( |& m& x1 B   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
) ?3 {' U  P( F   Lee.GetWeight();
   cout<<endl;
3 A+ T( @: ]" ~% b' @& N}
# M4 \# V; ^" }第二种写法：
#include <iostream>
using namespace std;
7 ~9 a) o# n3 Xclass Human
4 K! V$ C: U4 _$ |1 l3 E{
public:
( p  x0 }7 W& h, e$ M7 ? void GetHeight();
( Q. d% ]0 K% ~, k    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
private:
) c/ o1 G# O' a0 q5 |' E. X int Height;
7 @0 s3 J: G  @( j. N1 K/ K  V int Weight;
1 T& z' D. L0 f8 L6 K. T. X9 }};
void Human::SetHeight(int x)
{
$ J9 R, r3 R* d& |& U Height=x;
/ O$ |' ]$ Z; B) ?0 k0 T4 j}
5 R, a  c9 X, v" R* D9 tvoid Human::GetHeight()
{
cout<<Height;
/ M5 q8 I- p) B4 ^) g& R}
4 f8 P( V6 `- p) Z; Qvoid Human::SetWeight(int y)
7 j: p# _' R7 g+ w( A5 n{
/ I5 f% |# n' n* X1 t9 I Weight=y;
+ Q' N' \2 ^6 l- S( w}
# m; C! }& R# p$ C; V+ I6 rvoid Human::GetWeight()
9 [; {  G% F8 M+ U8 n* r) ^2 U2 F{
cout<<Weight;
}
void main(void)
) I) k* a0 R5 v1 |( @; A{
( X: J5 x2 E2 U, o9 B7 F   Human Lee;
7 {! e' O+ L: F7 v1 B* g7 _' m   Lee.SetHeight(172);
2 r0 Z  ]9 {! Q; ?* i1 }   cout<<"Lee的身高是：";
1 p* ^' O' n4 F- Z" d   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
7 M9 V9 I; X; e( V  j   cout<<"Lee的体重是：";
7 R- H0 ^. n7 S. {. {( c   Lee.GetWeight();
   cout<<endl;
}
+ j5 @; E* y# {( e1 ^9 J) P9 Q推荐第二种写法

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) B: L4 s, T$ }/ N% r3 P* ~; P