25.类，对象，成员实例

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第一种写法：
#include <iostream>
) M" \+ a! b+ ]8 s) W  [using namespace std;
class Human
* B5 l  T! v! K' B{
public:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
; U! _5 O! l7 p! }private:
) X+ X: V9 t& G6 O( z1 L. D int Height;
int Weight;
2 C) j5 p4 c( P};

void main(void)
- \9 v2 _& t8 D6 F( D{
0 G3 }2 \! ~3 x+ L: N% D6 X2 S   Human Lee;
   Lee.SetHeight(172);
# X. s- R, f4 I7 y   cout<<"Lee的身高是：";
: x1 Y) x( G. }8 D. d   Lee.GetHeight();
: J1 ]' C- _% S; p2 {9 ?   cout<<endl;
! l! ~$ Z! `4 L) u4 u& w$ L( r   Lee.SetWeight(120);
1 x  l& N. q' V2 ]   cout<<"Lee的体重是：";
4 Z  U$ u! Z8 m( v$ U8 x6 |   Lee.GetWeight();
; g" b( w; J5 K% \, G   cout<<endl;
}
& [  G0 y+ s/ w% S6 Q% E  M7 G第二种写法：
* s1 ]0 _$ R! `2 q4 K#include <iostream>
using namespace std;
class Human
" t0 v* C# ]  ~! [{
0 }+ Y* D5 _" L8 k' tpublic:
void GetHeight();
    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
! w$ q1 V& Y, J5 `' Aprivate:
3 [3 d/ G- p0 R9 s- y int Height;
9 S- m: [6 l1 j6 h+ G int Weight;
};
8 X$ c( y0 l* O/ ]8 g3 lvoid Human::SetHeight(int x)
{
' n5 S9 M, T5 p: \6 T( K Height=x;
}
void Human::GetHeight()
{
cout<<Height;
}
void Human::SetWeight(int y)
{
) M) |9 k3 o- s" b Weight=y;
}
void Human::GetWeight()
{
cout<<Weight;
, {4 b, E' K0 u: ]" N5 |}
void main(void)
5 O$ O+ M, @$ B{
   Human Lee;
0 x: ?5 |" G* ~  D9 J) H) B   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
# x  m& x- Q2 }" O6 b; u9 I   Lee.GetWeight();
   cout<<endl;
}
4 k. ]& ^/ c, x* G推荐第二种写法
  R% Q" C0 ]8 j$ a; b
! M3 H. C. z" @  I5 ^8 F