25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
class Human
{
public:
) C, ?( ?1 K5 @' v) S( ~ void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
0 {" s- M. U" O$ [( U: D int Height;
! H4 A" ~8 ?1 k& |: I int Weight;
) x9 \2 f+ O( H% W  p};

void main(void)
{
8 b& j# l5 y+ Y   Human Lee;
& P) m; K4 j! Q. r9 |# n5 o   Lee.SetHeight(172);
) d4 T7 J" h# C8 U  d) N8 U   cout<<"Lee的身高是：";
6 D* s* F; K0 i- R5 R  C   Lee.GetHeight();
   cout<<endl;
2 ?) F" E" w; g! d2 z* Y3 ]- ^9 m   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
}
0 A) N7 t  g- L+ K第二种写法：
#include <iostream>
using namespace std;
class Human
{
. j" l$ ]8 m( K2 E, Hpublic:
void GetHeight();
& }( Y7 f: j6 r8 b8 G: p2 E- h& v    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
, U# ~1 v: h8 L6 S3 ?private:
) ]+ s9 V; X  l7 b9 g int Height;
$ M' J! T) s& ~' ^! u int Weight;
$ U; s  q. r0 c};
, @4 ?7 Z0 f7 Z3 {1 xvoid Human::SetHeight(int x)
, d& ^2 }0 D: v& P, a7 G! c{
Height=x;
' ?! Y2 T$ D# d& r1 p% v}
) t# U! z; @; s6 P3 d8 @void Human::GetHeight()
{
cout<<Height;
5 P. ^* _* |7 D& ]}
% H0 G# F% R2 z1 Zvoid Human::SetWeight(int y)
& X& {! t9 j+ d+ ?- t; S+ Q{
Weight=y;
5 b% I7 V7 q, |4 f}
$ f7 [% L. j; _void Human::GetWeight()
{
cout<<Weight;
}
3 i% B9 {  u6 i; S5 y& w/ K$ evoid main(void)
) q, U' S3 ~: b. O. s. B{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
; l( o0 _& m( ^$ y& B   Lee.GetHeight();
) }5 C! z: y) ~# s) e2 K/ j1 R   cout<<endl;
/ f) a  C, Y) E5 T) O/ b2 Q5 L5 M   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
5 w. b0 y! P; h5 G4 @   Lee.GetWeight();
   cout<<endl;
}
7 Y: X" P% b; W) |9 C, N* |+ G  L推荐第二种写法