25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
class Human
{
# h5 b8 K( m. i  b9 s; T2 Opublic:
  D" E; E, e, n  x) b0 D void GetHeight(){cout<<Height;}
$ _7 D' m+ Z1 t( ^+ u+ W void GetWeight(){cout<<Weight;}
3 ~- l' Y7 r6 K4 R; b void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
int Height;
int Weight;
};

void main(void)
{
+ s+ n) W- }3 x5 ^6 X& J1 H  N   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
6 @, {$ v  p! N: J2 a   cout<<endl;
  y1 x4 R. V) u   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
- b" k" z" d9 `3 U/ i* t1 b3 v3 W   Lee.GetWeight();
+ N3 t- c) ~3 p+ `& O   cout<<endl;
! n& G, v  ~( G, X' W}
6 L. I: V- x5 G+ @) ^# f  i/ S第二种写法：
#include <iostream>
, m! s( Z1 b6 s4 C: s$ Musing namespace std;
5 V* a+ u9 O% r/ Fclass Human
) D3 t7 q  |8 F{
public:
void GetHeight();
* p) e: ~  J* w    void GetWeight();
9 d& u' g5 u9 Q- \1 P# \ void SetHeight(int x);
void SetWeight(int y);
private:
int Height;
( C" S" ?5 W, a8 R: A# L int Weight;
: q! o0 d8 z8 z+ h0 n- P};
9 M5 O, c# S4 h, r. R' Qvoid Human::SetHeight(int x)
! m4 X1 O7 S$ |, n/ L- L& z{
: x1 C$ ^5 M% j$ k+ F Height=x;
; E" M$ t- A/ k) `" g! t# L5 V}
void Human::GetHeight()
{
cout<<Height;
}
4 V; d4 y+ O9 t) k1 C. W1 Gvoid Human::SetWeight(int y)
{
Weight=y;
}
void Human::GetWeight()
  N7 O9 A% k1 o+ y7 \{
cout<<Weight;
}
9 [9 A5 j9 ~! e# C# S) ~void main(void)
- W) U* p3 i6 a, Q9 l  U: i, F5 o{
   Human Lee;
. r% D# q' w# S0 m   Lee.SetHeight(172);
9 p9 }5 h# d- L" j- b+ o0 r3 g' T   cout<<"Lee的身高是：";
8 W) f, u5 a) h7 @# e   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
# u/ Y1 v5 G6 t$ K: p0 A) _   cout<<"Lee的体重是：";
6 T8 _$ r; g% a& U$ J% T: K   Lee.GetWeight();
   cout<<endl;
3 ]0 X, ^/ [0 p% s7 J}
4 s+ a$ F+ ~2 i+ f3 ~% r推荐第二种写法
8 z9 i" @9 T6 }/ y9 a: F8 A
5 o# @6 m$ M, v
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