25.类，对象，成员实例

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第一种写法：
#include <iostream>
1 L  R, d' a5 eusing namespace std;
8 C( @  M3 W$ Uclass Human
( s* d+ u8 S  c% i9 g: m{
public:
void GetHeight(){cout<<Height;}
& x$ p2 }, B/ W6 v void GetWeight(){cout<<Weight;}
* f. \0 x2 v# @0 }$ M( d) n void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
: u" a" ^- [% Nprivate:
int Height;
) v7 N7 O8 e2 T# h" v8 K# }1 _' B int Weight;
7 L% g& x3 e# d: F$ g2 n};
1 i4 }0 C) R. T6 i0 W$ d5 V2 E
% y& P4 U+ s) B8 B+ ?) [) e" ivoid main(void)
{
4 K2 b8 S/ Z, c   Human Lee;
6 Y; R/ o8 a8 K  J) s   Lee.SetHeight(172);
1 g. o% b3 R/ d" Z- v3 J/ u   cout<<"Lee的身高是：";
. a! n" ^1 X! V, f6 ~; q   Lee.GetHeight();
   cout<<endl;
0 F$ A/ B; C. z8 u0 r/ ^# j/ c   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
0 {8 @. O9 s# m0 X0 H. s8 m4 u   Lee.GetWeight();
! E5 J7 x9 S- U6 R   cout<<endl;
6 j+ O: u. z3 k3 c0 f; {, W( m}
第二种写法：
, ?# w/ V! `/ G9 @4 x#include <iostream>
using namespace std;
" w  n  |$ D8 ^4 y7 m4 \7 Rclass Human
{
public:
( M1 k& T. b3 V  F. h: \- a4 i8 S void GetHeight();
    void GetWeight();
, p' d* f* H; T# I void SetHeight(int x);
void SetWeight(int y);
* q  g7 N, E7 }% ?private:
int Height;
int Weight;
};
9 U2 C7 Y. }" `5 O# ~/ ]void Human::SetHeight(int x)
) B5 j; h8 e$ Z) d9 R; d{
Height=x;
+ J# p- B& s% F0 l}
; M% ]  v  o, nvoid Human::GetHeight()
- |% _9 A0 {' y) U( w9 X' t{
cout<<Height;
! s' a3 t3 o' C, I1 K}
9 S- u  L; S+ T3 Y$ h+ b" pvoid Human::SetWeight(int y)
+ ~& w" Y8 [' h{
Weight=y;
! @# ?5 }8 Q3 {' a, O}
% E8 @7 h6 V: p) ?: F: O* S0 Q9 w, d. Hvoid Human::GetWeight()
{
6 D6 ^! W' n* j* S, R cout<<Weight;
9 V' ^7 F7 E6 W$ ?- M}
void main(void)
{
: y+ S7 E) z$ D/ R   Human Lee;
# u& t) K- Z# B+ u3 N: p   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
3 P& i3 a: B: p   cout<<"Lee的体重是：";
1 g) x0 a7 c& M5 ?+ \   Lee.GetWeight();
   cout<<endl;
0 p# }% Z8 Y" I! P6 ^; ]  I}
推荐第二种写法

9 a. I& q  `/ I) ?