25.类，对象，成员实例

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第一种写法：
. g. T  Q) l' p1 M6 W; E#include <iostream>
4 h' |2 J1 v) x. jusing namespace std;
class Human
! s: H  {1 |# D# `/ O# f7 h{
% }8 M. X7 s* {: c' G  h" c$ Qpublic:
void GetHeight(){cout<<Height;}
4 N) @7 e3 Y. Z' L! `0 Y void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
5 T8 q/ i+ q1 D) r7 b- b/ G  f void SetWeight(int y){Weight=y;}
1 N' z0 k, X% \6 B3 f$ Y2 V7 P+ \private:
) v( E& D# n, d; h- H3 J$ ~2 v$ u+ G& @ int Height;
5 ^- h. q1 G! A, _# i int Weight;
5 m  W" X! P/ T};

void main(void)
% x2 G3 x: `' Y# i% a2 h# L4 i{
   Human Lee;
   Lee.SetHeight(172);
7 g9 ]+ I7 ~/ r( ~7 [   cout<<"Lee的身高是：";
& A! F1 p9 X% a* [+ G7 X- q+ o7 k5 [   Lee.GetHeight();
   cout<<endl;
" h/ A7 R! S& _, l3 g" O& H   Lee.SetWeight(120);
4 h% P' \" i8 G   cout<<"Lee的体重是：";
; T# U/ o/ x/ }6 I7 i- r   Lee.GetWeight();
   cout<<endl;
}
( c1 F1 L  W* a8 m第二种写法：
#include <iostream>
using namespace std;
class Human
1 i" v# L% O% \9 d  `8 w6 N9 x{
public:
/ N3 X; t% V- r8 r0 N+ Q  K! u. e; F void GetHeight();
$ b& u( z  y" u; i. Y/ p+ Y    void GetWeight();
+ b% ?% p$ T$ _- r3 V. g void SetHeight(int x);
& R9 v- F3 X. R7 j/ r0 F void SetWeight(int y);
3 }  T* O) ]7 \* S  Kprivate:
int Height;
int Weight;
1 ]+ h8 f. U. F4 j6 s};
$ U& m) v6 P2 p2 I' Evoid Human::SetHeight(int x)
5 o9 A. q7 l6 F5 o{
( }- x, A: O, z! k4 g Height=x;
}
void Human::GetHeight()
{
cout<<Height;
  h9 V/ t0 x4 [! T' u}
void Human::SetWeight(int y)
{
3 A7 H/ g" m( m: V; x5 i1 S* I( T7 M Weight=y;
+ o/ i  Z2 i4 |" `}
void Human::GetWeight()
- T2 `6 j6 I0 D{
cout<<Weight;
}
# `# }4 I+ o' H6 wvoid main(void)
7 m6 J$ R& _  X( H9 `* ~" h" }+ k{
   Human Lee;
( G2 }5 E6 }: d: S& b; g) n) p* S   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
. p7 {: s! s9 P- ^6 Q4 w   Lee.GetHeight();
1 ?2 _+ X0 q3 O  Y  h. m   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
8 C5 ]% C& ?$ v# J" l, ]   Lee.GetWeight();
9 |$ X9 A0 _* \) \8 h5 D   cout<<endl;
}
" f+ ~! p( Y2 E7 T) M推荐第二种写法
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( U# @, y4 f* b  x& L1 b