25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
$ X/ e  A5 [+ {3 s) Tclass Human
' [) K# X- m( ^, E/ C5 Z% N  `7 N0 V3 z{
public:
5 j5 Z3 U1 f" I) ?8 z void GetHeight(){cout<<Height;}
# B4 W& ?/ _; C1 g* r6 K! K void GetWeight(){cout<<Weight;}
9 C: X+ n( H/ K3 E$ `$ o* }, K- T1 c void SetHeight(int x){Height=x;}
2 j" f/ B, b8 S, B) F) J void SetWeight(int y){Weight=y;}
private:
/ {3 H; B3 c$ H( P int Height;
$ x: G0 y4 ]# \1 C1 E  ] int Weight;
};

void main(void)
{
5 N! J  [. |  j6 y; H1 j7 X* }4 N: Y   Human Lee;
! o) G4 n  ?) K0 z% c$ X   Lee.SetHeight(172);
. e. {6 T! T: ^$ o& \( \7 K   cout<<"Lee的身高是：";
! H4 t9 V- v( [. g) j# u5 _% o6 U! C   Lee.GetHeight();
+ Y5 v! J) b# T! v- b3 A6 p2 _   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
! i0 `) O$ ^. [/ l& L  v2 Y}
% F# a# H) Y; P! V第二种写法：
#include <iostream>
using namespace std;
* z$ |( ]7 k- Z* {8 ?9 d) P* Lclass Human
9 a# U  [# N4 Y{
public:
& ?( r) }3 B3 ^/ _3 ~' k void GetHeight();
  |6 L3 a$ k9 |7 S# j    void GetWeight();
4 j/ h: K" j* o+ x: I void SetHeight(int x);
void SetWeight(int y);
private:
2 I( c  L: W# z4 ^8 K int Height;
  Q  r, t% j( l; M. a3 g/ w int Weight;
7 G2 v1 f% h2 s" D};
5 _4 Z7 F, o; M! i; n* Gvoid Human::SetHeight(int x)
{
Height=x;
}
void Human::GetHeight()
{
6 w& ~  }" V6 s; B% f) p8 D; [ cout<<Height;
( U/ n( J% q! C}
$ f* G2 u) G3 e6 R5 J- mvoid Human::SetWeight(int y)
# w2 H- s9 D! u! p2 t0 s{
Weight=y;
2 R: i. J1 t1 }2 n* o}
void Human::GetWeight()
, ?8 D2 e3 N4 t+ a- u{
cout<<Weight;
# {& s0 S7 {* K' R/ d}
void main(void)
{
   Human Lee;
3 W8 ]/ ?4 ?3 v) Q& a. E   Lee.SetHeight(172);
, m9 `% z! w" s5 g" l7 l1 E   cout<<"Lee的身高是：";
1 c0 b4 m0 E; |' V3 Z   Lee.GetHeight();
$ i* n  r) y# H/ Y3 r6 ?) L   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
4 E5 _( {0 l% B' l, _   Lee.GetWeight();
   cout<<endl;
}
* M2 z) E% |8 H' j3 n0 E3 ~( T: }, S- a推荐第二种写法