25.类，对象，成员实例

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第一种写法：
#include <iostream>
0 u+ z9 @( Y  J: Q, c. ~using namespace std;
class Human
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5 ^  q4 H+ ]% ]# j1 P8 tpublic:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
) c' C2 k4 K! _+ D: a void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
6 S* m$ u1 g: F! L, P3 p int Height;
2 {3 \0 m( j. ]# D5 h3 F int Weight;
" ^! u: `. Z: {};

# L; [6 F( F6 y. b& G: \# s; evoid main(void)
! q& b+ m. E, ^8 w% O* P{
! z$ x& Z3 _2 }" N  b   Human Lee;
$ n* M) ?9 ]) _! V2 o   Lee.SetHeight(172);
- [9 C1 _, Z" M. A- ^: \   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
; U' i: M2 c/ x7 T" t   Lee.SetWeight(120);
1 f2 p% k- h0 v3 f( m# A1 f   cout<<"Lee的体重是：";
3 g3 }* M9 ~! g   Lee.GetWeight();
% u; Q6 ~! Q; K7 o2 G   cout<<endl;
}
2 [7 t6 ~% R7 p& T! g% [4 `第二种写法：
#include <iostream>
2 R4 x% x! d/ |using namespace std;
+ p0 I- ?8 e. X- j) D! yclass Human
; P) t8 @5 H  \: E. @) _{
public:
1 J% L2 S( g& M5 J+ f! ^8 N" [ void GetHeight();
5 ?) L8 Z0 r3 m1 P    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
private:
0 n( \" `4 k; J+ E3 E* a! a int Height;
int Weight;
- ^" B5 t) q. d};
void Human::SetHeight(int x)
- q# O( f) a$ \, P, n{
Height=x;
& m0 L6 @6 {/ R! b& N5 I, H, y}
' H  `% c, a7 c( I! Vvoid Human::GetHeight()
{
cout<<Height;
}
void Human::SetWeight(int y)
{
Weight=y;
5 ^* F  g- S! C, {& j}
void Human::GetWeight()
' b% Z5 W8 [# \7 X2 `9 c0 y{
. t3 [6 R3 v5 l" S/ } cout<<Weight;
" i' B6 C. u& D}
4 i! I$ u. l9 \; ~. T3 l6 h0 Mvoid main(void)
{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
/ T  o  m9 w1 q8 X   cout<<"Lee的体重是：";
4 }1 k2 p2 z) ?" [( i3 J% v9 Y   Lee.GetWeight();
   cout<<endl;
' s" L& x" N( _: ~; y! `  {+ z}
9 T# F, C5 E# ]' l6 g0 U! @推荐第二种写法

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