25.类，对象，成员实例

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第一种写法：
8 l0 n. R0 x( q#include <iostream>
using namespace std;
class Human
" D& }- B$ Z$ H  `6 M{
8 @3 P, w- M8 |  |public:
( v0 G/ A6 S/ R6 z; k$ C- C void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
7 g1 g0 `0 S' y. T8 `% a void SetHeight(int x){Height=x;}
8 A3 f/ z3 q9 q void SetWeight(int y){Weight=y;}
private:
8 Y  W% r: T6 q3 _1 u6 j int Height;
  ]9 w+ ^' ]6 m. q2 A int Weight;
$ V$ i: ^) e. i# l" w- ~' x};

) z; C% U( g# a: Vvoid main(void)
8 h; T- P7 P; N2 Z+ C{
( a! ?* N5 ]6 y" N0 [- |   Human Lee;
' }# b8 F" ~2 D  {, D   Lee.SetHeight(172);
$ O4 l7 c( {* e$ p! V   cout<<"Lee的身高是：";
) }: A" t9 R6 y1 f! y, Q+ X" \   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
0 P7 n2 u0 @  [3 G0 C6 \- _6 E}
$ ?3 D( [3 U7 \" K第二种写法：
#include <iostream>
+ Q( J' w9 N# R% b- Iusing namespace std;
class Human
{
public:
void GetHeight();
    void GetWeight();
; W- ~* o4 N; Y" Q& p, @' a void SetHeight(int x);
+ i- N1 Z( C+ y+ p* f* [" v void SetWeight(int y);
private:
int Height;
* K5 e6 _6 p- q  u2 ? int Weight;
};
; s) [% W% F; M8 B/ tvoid Human::SetHeight(int x)
{
Height=x;
}
! S% W( @& @3 ^# u+ e/ tvoid Human::GetHeight()
{
* r7 E. q: j' |- T' [; s cout<<Height;
}
$ D! _  T$ e# z+ Q0 L  nvoid Human::SetWeight(int y)
{
Weight=y;
- z  ?- j) D& }}
void Human::GetWeight()
' \; ?: ]  u9 _4 o# T+ p+ p) w{
cout<<Weight;
}
void main(void)
{
7 b$ p8 c- a  k0 f) m/ G   Human Lee;
   Lee.SetHeight(172);
- s4 F0 w- \( q  E8 V2 U. w   cout<<"Lee的身高是：";
  k# `- J" v4 G2 v   Lee.GetHeight();
   cout<<endl;
, [  M' ?9 [. J/ H1 v4 H6 {   Lee.SetWeight(120);
8 X7 z/ h  p+ u$ @4 B8 V   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
: O' r, F8 L; e6 ?9 ]4 r}
5 Y7 I  V1 R- K- U推荐第二种写法

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