25.类，对象，成员实例

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第一种写法：
/ t9 ^+ ~) I9 o/ M& x#include <iostream>
& Z% S# V8 ~5 R! Y1 T8 g. H; \using namespace std;
' W# a/ M! j% u7 |class Human
{
public:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
1 t# z+ F9 [) ]. m3 r void SetHeight(int x){Height=x;}
1 ~9 f0 f9 f/ }, F2 a; t# {" h void SetWeight(int y){Weight=y;}
private:
int Height;
/ d" H1 H/ d, a! M int Weight;
};

6 S; A% T, X) Jvoid main(void)
{
7 z8 _" ?% `$ O; z- m8 }+ x' p   Human Lee;
   Lee.SetHeight(172);
* z) Y' L: K0 ]$ ]) I% l   cout<<"Lee的身高是：";
   Lee.GetHeight();
1 I" |2 F6 P3 E* a) K/ V1 d5 `" c   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
* E$ @5 h0 d" g$ s  Y% C   Lee.GetWeight();
$ n3 }% g' f! O  ~2 W   cout<<endl;
}
7 N  O7 \' j- C  S第二种写法：
#include <iostream>
" ~( l* m! K! v' w9 t- `using namespace std;
class Human
{
public:
void GetHeight();
, e' S5 |- w' n3 F, O' H( {    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
4 q) v4 V( @* L8 g$ P9 xprivate:
4 w) C' b+ J) a9 p int Height;
$ V& Y" `9 P3 p int Weight;
};
1 V% h6 H1 K  o- ~4 G( rvoid Human::SetHeight(int x)
& C9 ?% @1 C( n; J0 `{
6 }( J  p: R' W- I0 N Height=x;
) q: Q) t3 g) a}
void Human::GetHeight()
9 \4 h2 O2 U4 ^7 Z  A{
( r: s  M; t; f; B" r+ ~4 x1 ` cout<<Height;
}
9 I1 {/ c9 ~) x& J2 B' Lvoid Human::SetWeight(int y)
{
Weight=y;
. a  q( q: v& E5 k4 F9 K7 U}
4 s$ z% s* f( ]6 @void Human::GetWeight()
{
cout<<Weight;
}
, I1 ~3 M9 r7 o" Dvoid main(void)
+ Q, W: i* @9 y5 F{
( T+ s0 v" I* m# G/ w4 i   Human Lee;
   Lee.SetHeight(172);
1 n" ~8 \. W* ?! K) y8 L# k   cout<<"Lee的身高是：";
, A8 Y6 s+ d; n* L8 p, u   Lee.GetHeight();
   cout<<endl;
% }, x4 p0 j- _   Lee.SetWeight(120);
( I) h/ n* d( [1 _' J/ j0 v   cout<<"Lee的体重是：";
   Lee.GetWeight();
0 w3 _: r7 B1 o% I$ H   cout<<endl;
}
8 [. j3 Q. C4 Q) ]0 ^/ w0 F5 G推荐第二种写法
) K3 i4 x2 `. M