25.类，对象，成员实例

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第一种写法：
#include <iostream>
1 ?+ Z+ z: J, u* m+ S7 yusing namespace std;
* [3 B, Q' x; I, nclass Human
) v3 `, {% _) s# Q{
' d* [6 w- h# G4 J4 ~public:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
1 G5 l0 G- b) a$ _, a void SetWeight(int y){Weight=y;}
private:
. V5 p/ @5 G7 g0 X/ ~ int Height;
" E0 g$ u. }, Q! z int Weight;
8 k( |3 }- M  U6 O) g: ~# ~6 Z};

3 |& d+ v) k: nvoid main(void)
0 Q. ]7 A) G$ D" _7 A" z8 J{
* W: e* p3 Z" H4 f  j1 ~1 S9 ^( ?   Human Lee;
   Lee.SetHeight(172);
5 B# {. b% l" |   cout<<"Lee的身高是：";
0 ]) c+ q5 C7 A  S4 T- r3 {   Lee.GetHeight();
   cout<<endl;
& `+ d" o, b  P5 f# h   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
1 j' a" E* C- t5 V2 ]+ L& }) P   Lee.GetWeight();
, S3 U3 P5 S+ N& y   cout<<endl;
$ D9 a  D" a! A2 z}
第二种写法：
#include <iostream>
" D/ Z% Y9 ^. ^$ f9 p3 p) z1 Dusing namespace std;
" i9 [7 d# p5 r8 q2 R: Cclass Human
. ^$ b6 K4 I% R{
, p: k$ C. \( R- qpublic:
void GetHeight();
    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
private:
int Height;
int Weight;
4 Z5 `/ w: k- @1 o' w7 u};
7 z4 |: G4 I; Hvoid Human::SetHeight(int x)
{
Height=x;
}
$ ]! r, U7 B# R  U, k5 l- Nvoid Human::GetHeight()
{
9 V/ e1 t, E% z" l* z) X cout<<Height;
7 y0 r: Y2 g2 U' y}
void Human::SetWeight(int y)
" O$ W/ v5 X8 a: {3 f( K- _{
Weight=y;
}
9 }* N  M  C! I: v4 I5 ^void Human::GetWeight()
. v7 V2 }2 b& I& J/ J: N{
! y* |5 Y: p4 x; A, V: i5 b cout<<Weight;
}
- ?  |- V1 D& a) _4 I9 p* Rvoid main(void)
{
8 T# r$ V$ n6 J   Human Lee;
# R9 F1 T  v6 L   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
$ u' Y$ X* D: S! \   Lee.GetHeight();
8 ?! @& o0 ]1 P$ m( o, D4 f   cout<<endl;
# J, P6 V! L9 L: N' r5 U   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
* i& w: v0 m4 y) L+ _0 L: y   Lee.GetWeight();
   cout<<endl;
}
/ c6 f, H. }6 q0 Q6 w推荐第二种写法
! @  v2 v# H: ]+ J: m% E