25.类，对象，成员实例

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第一种写法：
#include <iostream>
& ]' A" a# w0 R4 N* Vusing namespace std;
5 f0 w1 l* f5 p* |: R. yclass Human
$ H- d' v2 F. }6 Y) y' @2 w5 L{
& L) H8 M0 D/ L/ W+ npublic:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
) c2 a8 f+ U+ l  e6 V void SetHeight(int x){Height=x;}
3 [+ W1 ^- [1 B3 ~7 j* { void SetWeight(int y){Weight=y;}
private:
' ^# R$ L+ T. M* V# \1 ^7 [ int Height;
1 F0 A2 Z8 _* V  o3 t int Weight;
};

void main(void)
4 [0 f/ c" n5 o. Y{
   Human Lee;
! z0 y$ E" {2 g" y% S9 N( D6 {  [" [   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
0 ~/ z# K# z8 p" k8 X- R   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
}
' u% V8 O4 x0 `9 c第二种写法：
#include <iostream>
" X1 y0 j9 o6 b8 c* A- pusing namespace std;
5 {. d. e- I! Z1 Z0 S" l+ L- bclass Human
6 ~: f* g0 \( S. V6 g3 ]+ Z. _+ ]{
4 ]! d. x6 J1 R1 p% u* a" M5 _4 jpublic:
void GetHeight();
$ a! n# C7 U2 ^    void GetWeight();
' h( t9 \! [2 e7 X( ~! D" { void SetHeight(int x);
void SetWeight(int y);
private:
, v6 L/ o3 E* L# |) I) g% T int Height;
" ?( [5 M# L( {' O int Weight;
) s: z. T1 F6 `1 m};
void Human::SetHeight(int x)
) J# Y- f0 x( e7 l5 @# d% r{
Height=x;
}
4 ^' Z* h5 R& C8 Y5 N2 j! F: nvoid Human::GetHeight()
- V- o$ ~0 {4 q{
1 V$ N7 N, T  ~1 e) ~ cout<<Height;
5 p  }: P/ \# ~7 U! j}
  o4 S: P( b/ m$ L  c+ {void Human::SetWeight(int y)
{
0 S( d2 E: s5 C1 s8 B: {6 z. x Weight=y;
% g5 `; @0 L( t, ]% W  ~}
0 v1 t3 s, v* c( h9 k& ~8 Bvoid Human::GetWeight()
( x' O" `( Y% s" U{
cout<<Weight;
}
void main(void)
+ [" l, i+ F7 w5 [2 Q0 @6 d{
   Human Lee;
, a3 V! v9 s8 L   Lee.SetHeight(172);
& T$ I. \4 p# _9 _. g   cout<<"Lee的身高是：";
4 E  Q* ?% p, H1 q( U; S8 g4 f   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
. ?' a& x" y9 ]% P! U( W   Lee.GetWeight();
+ A% J3 R$ C2 f( {. s5 d6 g   cout<<endl;
* u: T& [$ e4 J! b}
推荐第二种写法