25.类，对象，成员实例

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第一种写法：
( G% b7 |5 J* k; D6 g#include <iostream>
using namespace std;
class Human
& x, c3 n( ~  Z) d/ I* ]{
public:
2 y9 B1 R: @! m% u- x4 H0 w5 l4 ~ void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
8 B: d' Z" \1 n void SetWeight(int y){Weight=y;}
private:
6 s: Q7 u; \6 W* h9 }1 v int Height;
int Weight;
$ I2 b7 D  C( l1 x5 o/ W6 X  M# N% s};

0 w: }5 N) j. Yvoid main(void)
; f' |% p: x* ^9 p0 H. \{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
1 z# u8 e3 W4 E, j- s   Lee.GetHeight();
! v1 Z5 G$ r' R! Q6 M   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
  p6 V& ]1 V( h' W   Lee.GetWeight();
6 l/ S' Z/ ^- g1 h   cout<<endl;
+ ]5 s$ S2 {" }( L( z) O7 A}
- }% Z' C; ]6 A0 r+ X第二种写法：
$ S; |9 T! u4 k( N/ M#include <iostream>
using namespace std;
class Human
/ n; l* Y. \3 q. g) Y' h  _0 D{
8 l9 ]9 u1 c$ O2 c% _( ~" Cpublic:
void GetHeight();
    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
# z" I( I5 T3 b' j8 J5 rprivate:
int Height;
( A/ N2 T6 i8 _5 V( Z: ? int Weight;
};
void Human::SetHeight(int x)
! g# N' s# f3 |7 ]" l$ u/ ?) j{
- ~3 G5 \2 S, }+ z* g% {2 @1 K6 p Height=x;
}
void Human::GetHeight()
{
3 O0 h" A: N8 Q5 [$ B, i cout<<Height;
}
, Q) Y' ]1 N0 ]1 {. H( Tvoid Human::SetWeight(int y)
{
% P) b) v  X, ]" X: o) w& z& q: D' [ Weight=y;
}
+ l- ?2 Y$ {; `8 k! E' d/ i' Wvoid Human::GetWeight()
/ E, t$ f) V% p- j% W, C8 {{
cout<<Weight;
}
void main(void)
{
   Human Lee;
# i* @9 t3 h/ P. l: P   Lee.SetHeight(172);
8 X; D4 G& Q, p8 m9 W) Z, W+ u   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
! Z4 Z- D+ P/ R( m5 ]7 U   Lee.SetWeight(120);
9 m; L* M+ L. m2 s3 F' J   cout<<"Lee的体重是：";
! k+ y$ L7 {& _   Lee.GetWeight();
$ [9 i( m5 W9 X( n6 i0 Q   cout<<endl;
}
% E4 P4 W  [2 p& ~1 K" t% P8 m推荐第二种写法
' ?* S, P8 g$ B# B/ I