25.类，对象，成员实例

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第一种写法：
, f2 ^0 t3 F( m" h  \7 K2 @3 q6 x#include <iostream>
using namespace std;
: l: H: ~  A8 y! e2 S; P6 cclass Human
{
; d- ?' a  A; x0 B3 j5 opublic:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
) e) w/ k  M( P! D9 }# n6 S$ o void SetHeight(int x){Height=x;}
- q# u; D8 l! N! C2 s' ^- K void SetWeight(int y){Weight=y;}
private:
% Y( \4 d( P/ q, A( Q# `( D int Height;
int Weight;
& e5 D- ?, I4 K1 ]+ l9 `};
; v9 u2 {5 @+ M- Q/ ^, Y
; N- ^: w1 P! R) e# d8 k* ~6 kvoid main(void)
{
   Human Lee;
   Lee.SetHeight(172);
- m; f0 ]7 ^1 Y0 G5 ]8 s; A   cout<<"Lee的身高是：";
. ~5 V, B6 B% c1 j9 a   Lee.GetHeight();
8 g" S$ J8 S7 r& V& O- b. I   cout<<endl;
; ^+ \2 O# x/ A, w+ R( i   Lee.SetWeight(120);
  F. o/ [- O8 n. V2 F. s  I   cout<<"Lee的体重是：";
   Lee.GetWeight();
; p+ m6 S4 Q7 a/ t   cout<<endl;
}
第二种写法：
#include <iostream>
using namespace std;
class Human
{
public:
* G: P4 z+ ]: ?1 M void GetHeight();
$ q! W4 p2 G/ }* }& }    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
% O9 R, v  F2 h) u9 o, pprivate:
int Height;
int Weight;
6 K, V+ {4 F3 Y6 g};
void Human::SetHeight(int x)
3 I- k5 N0 C0 P( j{
( O8 d+ [$ j/ d Height=x;
& a6 B: j4 h% o$ x/ ?9 O}
void Human::GetHeight()
{
; ]: l: W1 U1 X$ I3 o9 z cout<<Height;
}
void Human::SetWeight(int y)
6 [2 r* S1 U! O{
Weight=y;
}
: P, N% f: W' Ovoid Human::GetWeight()
; g, N5 y, r9 X, W+ k0 g{
cout<<Weight;
( k' }( f1 R( L9 X' ^}
void main(void)
; B0 }. M+ k; T  C/ X2 b{
5 t4 o( h. E4 k   Human Lee;
" b: I! D! M; p9 Z  @1 I" }2 F" |   Lee.SetHeight(172);
# u9 d& D/ ?) g2 c& d4 t   cout<<"Lee的身高是：";
   Lee.GetHeight();
$ u8 M' x) H9 b( C: i- Q   cout<<endl;
' T) n  r* H6 O% w1 B   Lee.SetWeight(120);
' {/ Z8 [, y- u( }( n8 m   cout<<"Lee的体重是：";
- q! O& x1 l0 j6 `0 _' l8 k  e   Lee.GetWeight();
   cout<<endl;
6 E: N" e) _( X% M1 D& f4 ^}
; d- G3 s4 }" i" q) G3 d推荐第二种写法
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+ Y% C9 i9 C$ G4 Q