25.类，对象，成员实例

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第一种写法：
% I; j) z# d2 b  Y- I3 X: t#include <iostream>
using namespace std;
class Human
{
  K8 Q2 Y! e; p* v8 H6 B0 U& z& Xpublic:
# \: |5 r% J& |* K  g. W$ k void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
7 K/ V! X0 w8 D, t% i+ w void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
. T; F3 v) E1 E! eprivate:
int Height;
: j' F, l! a0 [ int Weight;
};
  o1 B, H5 D8 p" n/ r
: V# n& x/ q! ~8 t  \void main(void)
% l+ d$ `# M4 d- V) ]3 l, w{
" k0 C; \. `8 @! s, s: J# v# F% v- n   Human Lee;
7 D; X% \. n$ T   Lee.SetHeight(172);
+ t8 h* L0 P! u% i0 \   cout<<"Lee的身高是：";
% W. U9 O6 N, D# E6 |3 \   Lee.GetHeight();
   cout<<endl;
& L. ], T: [1 ?' n/ \0 p   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
! L+ K, l/ x& U' `   cout<<endl;
4 i$ L( g9 T+ _3 h4 i$ t$ K* D}
5 i  v# Z* g7 u$ Y  e1 D3 _第二种写法：
#include <iostream>
  @5 v$ u& H8 [using namespace std;
( Y5 s/ m( h3 x, L. y3 D/ o* Oclass Human
{
public:
void GetHeight();
    void GetWeight();
void SetHeight(int x);
; k* M" z9 r) u void SetWeight(int y);
# E" M$ m, K" Z$ h: f% oprivate:
4 s+ M  @3 M# N7 E7 @7 M! O# Y/ ^ int Height;
int Weight;
};
void Human::SetHeight(int x)
{
+ m7 d! @0 r; c8 w, U Height=x;
. h2 a. f6 A& Z  ]$ @}
void Human::GetHeight()
1 u5 P3 F& N; z7 b- Z5 K{
cout<<Height;
}
void Human::SetWeight(int y)
4 {+ c( |' b% \* J, P/ Q2 ]{
$ x8 a& `  E. q0 |* L! Q) ?1 X Weight=y;
- F# e, L9 p7 S0 o  ^+ z}
) N( E  f4 Y7 i& j" cvoid Human::GetWeight()
{
0 H( y2 v) m1 V+ m9 s cout<<Weight;
  {2 V* W3 N2 V) }}
7 g$ `; r+ X$ O9 w" gvoid main(void)
{
5 z" h4 k1 J0 ]1 t  h   Human Lee;
3 |" Y8 r2 L5 y0 i. m   Lee.SetHeight(172);
: V/ [; V2 j4 w# H   cout<<"Lee的身高是：";
* n: ]7 w: X0 {   Lee.GetHeight();
   cout<<endl;
! R0 S" o" h9 b, n   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
6 U, u( A2 V$ k- d; C7 F2 h   cout<<endl;
& t4 m0 I7 V+ d* |! _0 f% m}
# H  o& [, w0 y/ m推荐第二种写法
( [* o  _' ^: P, P
4 C+ X$ R4 q% o# D5 R) U