25.类，对象，成员实例

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第一种写法：
#include <iostream>
) v, v( L% g0 E: c9 l9 Z+ ?! \7 {using namespace std;
class Human
{
public:
: ~6 \$ Q' q) e  I( |4 _ void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
9 P! Y+ Z' n) E3 y3 T" W void SetWeight(int y){Weight=y;}
! ]. ]4 I1 H+ g# {( ?5 D: ?private:
int Height;
1 C; Q% a$ L# d/ b% a+ P6 v int Weight;
2 Y; D+ B! n4 L4 x3 A4 [};
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void main(void)
) P# s' Y8 I/ L  x/ n8 G1 f{
   Human Lee;
& v/ Q$ V0 e. k   Lee.SetHeight(172);
6 v( s( Z/ @3 U7 A6 ^8 x   cout<<"Lee的身高是：";
   Lee.GetHeight();
  S: p+ `' T2 e0 Z- e* K2 R   cout<<endl;
. l% N+ d2 p2 h3 o   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
- ^# h  I) [0 I# Y   cout<<endl;
6 E* @* a4 w- W/ Z' ], e}
第二种写法：
#include <iostream>
using namespace std;
class Human
{
* d7 z( b" {& ^public:
void GetHeight();
    void GetWeight();
8 l. b3 q# p. {( [$ K' q void SetHeight(int x);
, }" V+ v+ H" M$ V$ R; ~9 M7 k# A void SetWeight(int y);
% u! K# e+ E0 T& N8 Gprivate:
int Height;
; ~1 S' Q9 }' d1 S. s int Weight;
};
void Human::SetHeight(int x)
{
Height=x;
* W% h# B4 D0 M; N. W}
void Human::GetHeight()
' W  Q/ `2 ]3 |{
+ }4 J) i# z2 b! q4 p/ Q cout<<Height;
; E/ x) g  B, y' G9 E' Q. E}
void Human::SetWeight(int y)
1 M, u/ p7 V: i{
Weight=y;
! P9 m2 i- k5 w. i}
8 s$ R* B' H5 Dvoid Human::GetWeight()
5 d4 B7 K9 `( d3 D0 Q/ L{
cout<<Weight;
) g! p3 S$ l' _( v/ f- U: F}
: y/ J" j- Y4 _1 U, j4 a, C6 Evoid main(void)
{
/ B& y4 Q4 U0 z1 y# {   Human Lee;
   Lee.SetHeight(172);
2 F5 {4 K" X0 x9 }   cout<<"Lee的身高是：";
   Lee.GetHeight();
: {. j& g3 e0 W; |5 I+ x! t+ }3 [   cout<<endl;
   Lee.SetWeight(120);
% G- m, _$ V' A: K8 `' S1 O) [" k   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
}
5 `: e& v, _4 R4 x7 b- Q: |1 a推荐第二种写法
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