25.类，对象，成员实例

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第一种写法：
) |: u- Q6 ]- q#include <iostream>
using namespace std;
3 p  @/ ~8 p( Y" ~  Gclass Human
, P8 |3 h! L5 y% l1 ~$ E- s+ o{
9 T8 N( w8 m3 a0 g9 t6 G" tpublic:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
6 W8 [' J, A' O- y void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
. c' A  l. x* }0 `$ g# \private:
2 z7 Q3 \' I0 K# ~5 S# U int Height;
int Weight;
- X  _$ G- A9 q0 S! c};
$ n; @" f5 B5 f6 L! q
* i# l. v* W2 _1 Q2 U& ^9 cvoid main(void)
  L! H- I" G, p& y/ M{
3 x, p/ n9 u9 X, K1 c$ {   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
$ K$ a5 V& b  _9 w   Lee.GetHeight();
   cout<<endl;
9 g6 x3 g' b6 G/ Y   Lee.SetWeight(120);
! `* p% B/ d2 c( T0 `   cout<<"Lee的体重是：";
0 R9 R/ e. k, r- |  X* r% `   Lee.GetWeight();
   cout<<endl;
; K/ V' j- k. N) @( r" C$ @3 A1 e}
第二种写法：
$ x. y9 A4 Q3 c; [+ k#include <iostream>
7 u, ]2 N8 F8 J' d+ o1 n; nusing namespace std;
4 y5 m& E1 V+ j% Y9 a9 m7 m7 N+ rclass Human
{
public:
4 H4 F8 e, n; q$ J: `- j  p void GetHeight();
    void GetWeight();
void SetHeight(int x);
) V% n5 y3 @7 ^" Y& H6 V( T void SetWeight(int y);
private:
int Height;
8 s5 @) B* P; u' B* Z/ n int Weight;
};
2 {! S5 h( ]. @0 xvoid Human::SetHeight(int x)
{
Height=x;
}
void Human::GetHeight()
& ?! d# _) L: N. g, W{
cout<<Height;
( Q( T4 X) g* }: q$ @8 p4 ^}
void Human::SetWeight(int y)
{
1 r9 E" |* T" ?7 W, m Weight=y;
}
void Human::GetWeight()
' I& g( \" }: u3 W{
cout<<Weight;
6 K5 N6 Y. J" ^! s, A( y* I. G2 D4 g}
void main(void)
{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
! k3 I, [, Q1 B   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
/ t2 Y5 p* E) u1 S+ J; |) ^0 r   Lee.GetWeight();
) v8 }1 X8 o- L$ j7 s   cout<<endl;
}
推荐第二种写法
8 I) _: \. G( Z& ?( f( \/ j
8 U% {6 X. X1 |0 O' R0 t
) r3 K+ @3 q9 v6 G9 r( r  d& h