25.类，对象，成员实例

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第一种写法：
#include <iostream>
6 \* O0 f) S; D4 x& @  _using namespace std;
class Human
5 ~7 i5 {- M5 T) s5 a{
public:
void GetHeight(){cout<<Height;}
  Q  C" A/ o3 @5 Z void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
3 d- s# B1 D/ `$ c8 j" B0 r- yprivate:
! N/ N/ o# t9 P4 s int Height;
$ R9 x  V' E$ p+ X" W( c( ^7 m int Weight;
, D6 _. |6 q! n: {3 L; h" q};

void main(void)
+ f1 `; h; a, o' O7 j$ M( R{
) c$ b- {! l6 p1 k9 x5 c   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
9 c) B2 {4 X9 W0 e   Lee.GetHeight();
   cout<<endl;
& q+ U! m+ g. N  @! o- l; k  ^8 G   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
* i, F3 D+ \2 u) X   Lee.GetWeight();
6 }+ I# c/ ^; c0 K2 i2 L* j   cout<<endl;
}
9 C) _9 |, R1 x第二种写法：
#include <iostream>
using namespace std;
2 g2 y- R( w% i5 A4 }class Human
' F% I: k( g1 n8 T& r{
' z7 d2 C" o$ J! S4 Gpublic:
void GetHeight();
    void GetWeight();
+ k+ a0 I, t. I2 E8 o void SetHeight(int x);
9 F- b& A8 R+ L2 |' C3 K+ |  k void SetWeight(int y);
5 m6 S: R% c! yprivate:
int Height;
int Weight;
6 A& {# u+ C" ?) c# M};
void Human::SetHeight(int x)
{
0 ?% H$ ]" D* u/ w1 i Height=x;
4 S; z/ H/ b1 K}
3 X% o; |, R2 K8 T8 Mvoid Human::GetHeight()
, K4 v( _" N# z% O5 g{
( S2 e/ ~. Q: L# K- b  V* \* n% _ cout<<Height;
) H3 P. R# Z3 U, P/ |}
void Human::SetWeight(int y)
{
Weight=y;
/ C; C/ y8 ^6 }9 w( Q5 Y}
+ q: |7 T$ I1 o( s, jvoid Human::GetWeight()
" c& c- D  x$ S( S2 A4 o+ v1 R; U; P{
* r8 X" e+ P% R cout<<Weight;
}
$ ^1 ?9 f4 K" F* `# C4 y3 Gvoid main(void)
{
! U% U/ L8 d, ^) O$ N8 ^  w% |- N   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
9 ^' ~7 A/ K; v0 z; C: P   Lee.GetHeight();
   cout<<endl;
0 d2 z2 _# @. H) A: M7 {  A8 O+ h   Lee.SetWeight(120);
' D0 F# w9 i- _3 X   cout<<"Lee的体重是：";
   Lee.GetWeight();
0 S$ t* a+ K$ F( _% H   cout<<endl;
}
( p$ z6 l7 p  P推荐第二种写法
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