25.类，对象，成员实例

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第一种写法：
3 r: t& T; }9 Z+ R* z6 i0 O#include <iostream>
using namespace std;
( u0 U2 z& e2 R# Q& H$ [class Human
{
, D6 N! |- E9 b- hpublic:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
* c5 D. E' `! s- {+ d void SetHeight(int x){Height=x;}
9 @7 e% F1 x6 q void SetWeight(int y){Weight=y;}
private:
int Height;
int Weight;
};
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# m9 W2 ~- K* X+ |+ ~void main(void)
{
. P. d& Z& g- f! o   Human Lee;
. O5 L- N3 ?7 k7 u: c) l   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
+ X+ m/ c! N& z   Lee.GetHeight();
$ Y7 l7 k7 ]$ H3 g+ W   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
( z2 w% c& P/ P9 y7 b4 r}
第二种写法：
#include <iostream>
using namespace std;
class Human
{
public:
% P; B( D* C$ s, E  } void GetHeight();
8 z" z- ]* G' R1 g/ j' `: D    void GetWeight();
/ U, w4 b  }0 ~* u; G void SetHeight(int x);
- Y- c' ^+ B0 t* Z' G' K void SetWeight(int y);
0 e/ r, H- a" ]/ xprivate:
9 @3 c7 ], O6 l0 w' G' r0 r int Height;
8 C3 y" L5 j  j+ ]1 ?6 |, B int Weight;
};
void Human::SetHeight(int x)
; O3 V% P0 L6 z% T{
! K1 f% r( |) Y, t! w Height=x;
}
, R+ w8 j! P; p8 I* ]$ a4 a. Hvoid Human::GetHeight()
6 ~$ l( K# u! \6 s) v6 Q. G# X" R. H  f{
cout<<Height;
, N0 S. e0 }3 I/ m  @1 X}
void Human::SetWeight(int y)
{
# ]9 z" k: O( A Weight=y;
}
) a& U9 m/ h( Y2 g& t4 l4 M9 ^void Human::GetWeight()
{
cout<<Weight;
+ A# G1 h7 g5 c/ s: N2 _7 [4 B( S}
void main(void)
3 ]* ^& f' C7 a9 `  S) @{
. g& n! v1 P0 C; W8 Z$ y- q   Human Lee;
2 m! v% n2 T6 L/ {" N   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
+ y3 n- }/ B$ f( r; I8 m   Lee.GetHeight();
0 V# Y7 R, s8 S; e* `   cout<<endl;
2 T) ?4 h0 p9 r# x   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
) D% P- X: y* z# q4 s; R   Lee.GetWeight();
   cout<<endl;
}
0 a! x$ t+ ]8 Q* g$ ?$ u推荐第二种写法
6 E1 ?, v" p7 }0 r9 d1 i
" G; I# G" h8 H; y2 e3 b9 O
* p) N& y" K- Y2 `