25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
class Human
3 q  y6 u$ Y7 `4 O1 J/ A, {( b8 a{
1 @) }2 m+ w1 ~6 f4 |0 b. ~4 qpublic:
" w  `) x' u9 S0 J- o; p void GetHeight(){cout<<Height;}
- Z4 W; l+ t4 r- s& J% Z$ a% P void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
int Height;
+ l1 r: B* X* ]) L9 w2 A int Weight;
# z) \8 O' W) N0 \) R# R  X+ y' _};

void main(void)
' B; }% P% a( o& V( J7 a( S+ p{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
# m: i+ j' a9 N/ n   cout<<endl;
1 \5 W8 b/ s* N) T& }   Lee.SetWeight(120);
; }9 g) C6 Y1 |8 i   cout<<"Lee的体重是：";
; m. X% [- L* f   Lee.GetWeight();
6 a8 h: c) x  Q: E) W   cout<<endl;
}
1 i. G3 J; B! m5 @. }9 f2 r第二种写法：
#include <iostream>
$ ]% L( w- y/ p% iusing namespace std;
class Human
{
public:
& y% m2 _" R- m$ }+ T/ V void GetHeight();
, k' Z) i5 P) q6 f% o    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
& }2 c1 o8 w) ^' Y6 ~private:
9 P& j! p* b; a5 Q int Height;
4 b; G, e* F1 t int Weight;
, z! h$ d6 ~* \/ P$ u3 D- W};
void Human::SetHeight(int x)
. o8 c9 v% n) r+ O, k5 A{
) M* u4 X/ R: D# ]2 f3 ?+ ] Height=x;
2 W/ ~$ `% o- C$ H5 G) X}
void Human::GetHeight()
{
8 z6 q8 t( G$ X! n; ] cout<<Height;
# w, x) g. n5 C' y}
7 W0 y- C) D! N, `- Svoid Human::SetWeight(int y)
{
Weight=y;
* g1 X$ r+ k" `/ E}
void Human::GetWeight()
/ q6 J0 }. {3 G# D0 r9 ]{
7 o! |4 M, u  @2 X, \  t* I cout<<Weight;
}
  s/ `+ b6 g+ I, a6 ovoid main(void)
; X; M; _2 p$ _$ k8 [$ T) G  _* |{
   Human Lee;
% ?' J% u, j2 ]   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
2 m/ [( y3 d6 T9 j) M: w; r' H4 T   Lee.GetHeight();
   cout<<endl;
; ^2 F. s+ U, K1 y   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
0 X  R4 P7 d: m% E}
1 w7 N  T* t- y7 |推荐第二种写法
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( N/ e; K5 W/ p& ?  c