25.类，对象，成员实例

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第一种写法：
+ s& A1 e' c( K, p/ @#include <iostream>
6 l' c9 @$ y1 U) d$ u& P: Lusing namespace std;
class Human
! a# B# y4 |4 V3 b. w{
public:
- K  X5 H' {8 J. _' D2 E$ z) P void GetHeight(){cout<<Height;}
% z9 }* c0 ~: ]5 E void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
9 ~6 _9 g4 k$ E* H9 ~ int Height;
int Weight;
/ `4 N) K- {+ A: }. t  D};
1 n& T- w) i2 G0 ^# B& P* g
void main(void)
{
0 W/ }  E7 g7 E   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
- h) E* r* q# c% K* _* U6 D  P   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
* Y2 n" V' y- V   cout<<"Lee的体重是：";
, C" q; X; A+ H7 I4 [   Lee.GetWeight();
, N4 k8 H9 \! J" v, ]: b   cout<<endl;
}
第二种写法：
#include <iostream>
using namespace std;
# G5 p! k8 A( oclass Human
, S2 m, T+ }/ P' J5 C( G, }{
public:
8 Y6 H6 j: F/ g& `; U  i3 V( W void GetHeight();
    void GetWeight();
void SetHeight(int x);
$ z/ d! z* j# h: N void SetWeight(int y);
private:
  [0 D9 Q0 `3 y/ l3 @0 t- s int Height;
int Weight;
5 R2 o4 M5 Y3 B% ^};
% T3 L, p- ^) u# i2 X2 qvoid Human::SetHeight(int x)
3 T9 [. Q/ v8 l3 _5 t{
Height=x;
}
void Human::GetHeight()
{
. r( x, P1 t+ Q0 e, t2 g cout<<Height;
) f9 S1 T8 I4 _4 ]3 a; R! T  I}
void Human::SetWeight(int y)
6 p# o2 X# W/ M. v, m' Q, P{
Weight=y;
}
+ G$ w, N( i9 p& Hvoid Human::GetWeight()
{
6 \( |- i/ W! L4 B  H# v cout<<Weight;
}
void main(void)
{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
  o" N0 V: H; @0 X8 r( z   cout<<endl;
   Lee.SetWeight(120);
) D7 [7 A! {8 I1 t- P: \3 V   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
}
7 p; e/ Y6 P4 q- k% C推荐第二种写法
  @( o. \. J6 X4 E- o

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