25.类，对象，成员实例

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第一种写法：
#include <iostream>
6 R$ v' k: T/ m4 D* t" qusing namespace std;
class Human
{
; ]8 {# M7 e6 T/ N1 e; G) K% [" H% y! Rpublic:
void GetHeight(){cout<<Height;}
. k8 }) x- i7 _2 |( ^- x% W* r void GetWeight(){cout<<Weight;}
1 S5 u! ]! {+ c7 B- H; z void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
6 {# q) ?( k+ L& [9 e( K3 L/ U! q int Height;
int Weight;
0 C5 I5 Q6 M7 \5 n};
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# }% V0 b* \# e$ v7 Yvoid main(void)
{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
, ]' L  \, q) }5 z8 r   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
3 G1 d0 X, x  v1 w9 K: M   Lee.GetWeight();
+ z0 G; p5 D1 x% d* c   cout<<endl;
7 ^6 @  Q  E* P}
' j0 h6 n9 u2 v& z' X; y7 V第二种写法：
  P. v  r" H, c8 {+ p! O4 Q" k' a#include <iostream>
, T/ g$ i5 [0 _  busing namespace std;
class Human
1 L9 b/ Y9 O) H& u- J* g$ J8 u- B{
public:
void GetHeight();
    void GetWeight();
7 t) W, F. u. W# {8 V& s  ~ void SetHeight(int x);
- W) A" a) J1 e. Z6 Q. b$ a void SetWeight(int y);
$ r' Z5 y6 T( ~private:
int Height;
int Weight;
};
void Human::SetHeight(int x)
{
# N/ b$ r5 ?. O9 Q/ i Height=x;
# P, s4 p+ v7 `' ~7 i5 }1 d/ l}
void Human::GetHeight()
{
$ L2 W; B! C# z" j) K8 k) W, a cout<<Height;
}
void Human::SetWeight(int y)
{
) T- E1 r9 D+ U) d' K Weight=y;
& P1 Y. |- U4 @}
void Human::GetWeight()
* O& P5 O. z" q2 P  p{
) b) P0 ~3 L/ c9 Q1 i cout<<Weight;
( z4 g5 D; z9 H& O7 I& ^0 q6 o}
void main(void)
{
; k' N) n+ y5 L5 f  [0 X. d: j0 ?   Human Lee;
   Lee.SetHeight(172);
2 R% G/ D$ e' ^$ @7 ]+ @. ~9 u   cout<<"Lee的身高是：";
/ a9 K5 ]6 n9 d7 x   Lee.GetHeight();
   cout<<endl;
. }( y$ z( {5 t6 k   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
}
; V9 r2 e* {* u) J, U4 @) q4 t推荐第二种写法

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