25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
& H4 S0 a) Z% U* k: j: }class Human
6 m3 W' b& i* o. Y! y9 d{
: c. Y/ Q3 t: [9 g' |public:
! n* r2 D8 _  t/ `8 G& P4 v+ H4 B void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
$ a! w6 K3 c+ C% o void SetWeight(int y){Weight=y;}
$ G2 A& A3 y/ f  t# Sprivate:
int Height;
int Weight;
};

void main(void)
{
' C- h4 W7 J* T7 d7 ~' J* A   Human Lee;
% s3 {: C6 w/ `* k, @   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
  ?+ h( w! k% x0 n6 f2 }  s1 _   cout<<endl;
   Lee.SetWeight(120);
  [) e* m9 D% z! h1 g1 x   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
}
第二种写法：
( W5 ], Y' J9 m% r8 l. u#include <iostream>
using namespace std;
% p* G- S4 Z) z0 eclass Human
5 R. ], y' C+ h{
: M' A7 r  P7 ~# _$ E: h2 g! Apublic:
1 P) W% E: |$ ~ void GetHeight();
- u9 g3 A& R* F9 e, y# N* V% K    void GetWeight();
void SetHeight(int x);
" q, y/ ~" o( Q7 F  m void SetWeight(int y);
private:
int Height;
" K0 U2 G1 j1 v+ j. N  }9 W: f int Weight;
};
void Human::SetHeight(int x)
{
Height=x;
% K& s  }& b  `0 A6 y0 ?}
8 H# F5 X$ @; d1 G  G8 Vvoid Human::GetHeight()
{
cout<<Height;
}
void Human::SetWeight(int y)
{
( b& S& e5 m3 D3 s/ L Weight=y;
7 E7 E6 u/ H6 Y2 M; O}
& P  K" n" s* S, x2 zvoid Human::GetWeight()
, }% t8 y) Z1 l! X& F" t- j{
cout<<Weight;
}
void main(void)
{
% j9 f0 H& q7 b1 Z   Human Lee;
   Lee.SetHeight(172);
) \( }4 M' J. [( b  z! Z, W   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
3 O5 ~) _" V" X# G  ^; G! p8 @   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
% H/ Y7 [& P- W$ L8 n: A* N) M   cout<<endl;
/ F) j) q: u# E" I' r# ^8 r. r}
9 X$ E2 f8 r3 M2 T% F, E推荐第二种写法

0 t6 |  Y( Z: m' Q$ u3 U9 J