25.类，对象，成员实例

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第一种写法：
5 t: ]: `  P5 o; c; {* V#include <iostream>
0 A8 L9 b" j  b: ]6 K% {! \: i( pusing namespace std;
& s5 ]! L; x$ ~: X' d2 tclass Human
{
: L1 z8 e6 c: m$ S6 Y; w0 u0 Spublic:
. ]$ ^- B$ v; d6 e void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
2 `5 r) m" z4 y$ C$ i void SetHeight(int x){Height=x;}
* e  ^3 @/ v! a. n3 B9 m  C. j void SetWeight(int y){Weight=y;}
! V8 I0 T0 l9 K+ b. ~# A  g" s2 H7 \private:
3 U9 O: X9 P. k" k+ L- J4 z' N int Height;
0 u+ g* u( r5 L- L3 t9 D int Weight;
};
6 _8 c' N; p% L8 w/ p8 S: \
$ a  b3 q, l% ?3 ^" k' qvoid main(void)
{
+ Q( l3 h4 R! D' h, c   Human Lee;
9 a; F; L9 N, }  V   Lee.SetHeight(172);
) a  f5 y  d  J1 g3 D3 }* {0 {   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
. ^* p4 v" S7 V6 e% z. c8 i3 D7 V   cout<<"Lee的体重是：";
0 Y5 U$ k' s3 r   Lee.GetWeight();
   cout<<endl;
}
第二种写法：
#include <iostream>
using namespace std;
class Human
{
4 C; \2 h4 y; c5 j8 @public:
void GetHeight();
    void GetWeight();
void SetHeight(int x);
6 y! D/ G. y# U void SetWeight(int y);
private:
int Height;
& V4 t% ?" J" N% { int Weight;
};
% L  j! C5 y3 Y* o2 {! K) Kvoid Human::SetHeight(int x)
{
! g4 U: H2 a! M; \( f5 R Height=x;
& y( U; z: h. }7 o}
void Human::GetHeight()
# w" M1 r6 f7 r9 P5 v{
$ B1 X9 u; t( k  X+ w cout<<Height;
}
$ L' p& Q" I/ u. [3 U! \8 S/ zvoid Human::SetWeight(int y)
{
: y" |2 d. c. |8 ^9 t Weight=y;
}
: S3 J2 }% l2 _- \& \) dvoid Human::GetWeight()
{
cout<<Weight;
% X8 L5 R$ ^% _' C}
) u% Z" u1 R2 a& {% S6 ]9 Y; `void main(void)
* O$ j7 X, u# m. G  r- y{
+ M( @8 w& g* n, Z) {   Human Lee;
; K9 w: E- l" x* M8 _   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
- m. ~$ f5 X' m8 z& P+ g- N   cout<<endl;
   Lee.SetWeight(120);
8 E( u" V& G9 {$ U' y4 a; D   cout<<"Lee的体重是：";
   Lee.GetWeight();
7 R' u& L) m9 D$ n9 ^# T   cout<<endl;
3 ?. b0 P! J/ D' w}
推荐第二种写法
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