25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
& p1 z5 F" Q! o' P' h9 _class Human
{
public:
void GetHeight(){cout<<Height;}
* a6 U* {9 K9 t% A% m void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
) r  i8 K' S+ e8 c  U# y: s void SetWeight(int y){Weight=y;}
: ~  ~( ~- L; t9 i' \5 Z! Xprivate:
int Height;
7 P0 U1 O. k. a" [6 c int Weight;
! t0 A, X' m8 t! I4 g. b' k. A/ U};

% A; w1 G$ `" _  v: ovoid main(void)
5 d' U. M' N/ ?1 Y{
   Human Lee;
1 h/ _+ q) ]  S  H   Lee.SetHeight(172);
7 A6 h5 n4 v  ?2 M   cout<<"Lee的身高是：";
/ D: Z! t( l& k( E7 i2 M   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
+ w. [0 y. F* l6 U4 _7 R   cout<<"Lee的体重是：";
8 R: f2 h2 L# E   Lee.GetWeight();
& W5 G" f5 X4 I3 Y   cout<<endl;
) j' i! r4 ~7 l3 @}
第二种写法：
#include <iostream>
( W/ y" O; P* O  K5 {using namespace std;
( f9 K% W  d. Q! m0 N8 f0 ]class Human
{
6 S  o2 ^& R; Q% w5 ^public:
void GetHeight();
$ t& B- N: t( H1 K: n! f4 u. C    void GetWeight();
void SetHeight(int x);
) O% s9 o5 E- j) o& | void SetWeight(int y);
: Z" W2 @- E* ~8 m8 g$ a- h7 s# hprivate:
int Height;
# [/ G+ Q; [! W4 x int Weight;
};
void Human::SetHeight(int x)
4 e$ l# n3 q% v3 c{
% |* |' K5 K9 G Height=x;
}
void Human::GetHeight()
1 {! M& Z. N7 Q{
cout<<Height;
  C4 K3 T( `% n8 |. o}
0 Z2 K" ?* _* j' N( z' @; }2 L# dvoid Human::SetWeight(int y)
{
Weight=y;
}
void Human::GetWeight()
5 Z) r" Q1 N/ l" k+ ^{
$ L  ~& P9 B, P, L7 x4 Q cout<<Weight;
}
void main(void)
{
   Human Lee;
' T: m' I. K9 j9 F8 {( e   Lee.SetHeight(172);
( E' u. `' I  c2 m& l, N) }   cout<<"Lee的身高是：";
5 M+ T- o2 q4 J9 C6 p   Lee.GetHeight();
6 U5 G- ~4 U! f  i7 `   cout<<endl;
" N0 w6 j2 |- h0 P. ^: S# @   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
5 t) c0 S' Y* E2 A$ }' j: Y" z* [" r   cout<<endl;
1 W" c; r; ]5 z2 `+ u" w6 A) N}
2 a; u0 t* A/ K4 x  z. u推荐第二种写法
: q/ O( T, h# ^3 V# q0 ^0 j

+ V3 z1 E8 b/ }1 i