25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
class Human
{
0 I/ ]0 O- d2 l/ J1 g8 ]public:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
, q5 G% I" Q" A* q9 @+ F6 v2 J) g1 Q void SetHeight(int x){Height=x;}
: Q  c2 m% H, S# s5 z5 O4 \ void SetWeight(int y){Weight=y;}
' R1 ?" A7 W: Y  R7 u2 L1 V2 Oprivate:
. D3 S% m4 ]/ Y& ^/ `0 h int Height;
int Weight;
};

void main(void)
{
) r" i) i. U6 a- c3 ^" B   Human Lee;
   Lee.SetHeight(172);
/ w# S( j: W8 k5 _( N7 M# ]   cout<<"Lee的身高是：";
0 W; B8 n; [1 W7 P5 X   Lee.GetHeight();
   cout<<endl;
3 c7 c& N& [! F3 O8 D   Lee.SetWeight(120);
- ]; ]5 l( f: F1 h+ s   cout<<"Lee的体重是：";
   Lee.GetWeight();
7 A. H/ y* h8 n% y7 i   cout<<endl;
% t0 j2 e+ v% @4 Y) L5 n}
第二种写法：
# `5 j; X0 |- T% E' I4 s. o#include <iostream>
3 P7 N8 F, p' t* p5 P) dusing namespace std;
; _7 i) E( _9 |- v' H7 p( Wclass Human
$ j9 \- H. R2 V2 K7 [{
$ I* v# o0 X5 D" k$ X6 u2 ypublic:
void GetHeight();
    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
private:
: X% d+ _7 ?$ J, H int Height;
. q5 t( v2 P- c" O/ }7 k int Weight;
};
void Human::SetHeight(int x)
{
# p) u9 g$ ]8 M$ B% t" }" u Height=x;
}
void Human::GetHeight()
{
( R& R! @* X( V8 k cout<<Height;
( C* T  l' ^. Y# ?- R}
void Human::SetWeight(int y)
8 F; T1 R' n1 ]8 B6 L  r! B/ K{
5 B8 h* W7 Q  o1 T, u+ z: j Weight=y;
7 G5 K- O' K# I8 @}
void Human::GetWeight()
" k9 ^* D) G* f$ \- P! q+ u! @$ i* l{
cout<<Weight;
}
void main(void)
{
) }/ K: b9 a4 n# A6 d7 k, J   Human Lee;
5 B* x$ H6 V& b. ?; z   Lee.SetHeight(172);
- O8 ]. o4 ]8 _' r   cout<<"Lee的身高是：";
$ Y$ q8 S& [8 O6 M+ P- d2 W   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
" {* o' A" r" q( r# [6 I9 }   Lee.GetWeight();
   cout<<endl;
& n6 @" N# v/ o# [4 q' F3 t}
% \1 C, T. m& c' C5 @推荐第二种写法
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