25.类，对象，成员实例

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第一种写法：
$ g7 q. \: x  N7 b#include <iostream>
using namespace std;
5 u, i8 x: e2 Tclass Human
1 e9 n4 b# Z; o- h{
& t9 [0 l" s. zpublic:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
: Q' ?/ K2 c7 s, { void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
% q4 I/ ~- c* V$ A) uprivate:
7 H0 V- e' P0 S7 C' ~0 H. Z" U- { int Height;
int Weight;
};

void main(void)
{
   Human Lee;
6 [3 p8 k: A- y# \- z   Lee.SetHeight(172);
. Q1 I7 q7 m* e3 }$ ?1 G; U2 ?   cout<<"Lee的身高是：";
, n- k- T$ m0 q" u   Lee.GetHeight();
   cout<<endl;
' l* x( i4 W3 l3 j" i' S   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
" E0 X9 S; t7 I7 `6 A% e   Lee.GetWeight();
  r: g  b+ G$ w+ y  ?8 G) l& _   cout<<endl;
}
第二种写法：
#include <iostream>
) r$ s# ~6 {8 G3 u3 Yusing namespace std;
class Human
, S4 U; M# s: U- L{
public:
void GetHeight();
    void GetWeight();
. C" H; p1 P1 H- I  C void SetHeight(int x);
3 [% ?6 U; I# ~+ g& e void SetWeight(int y);
private:
- n  A7 [! o9 z3 t$ k% q int Height;
int Weight;
- N  M& I: I! e8 u7 _' }* j6 Z};
& u0 q$ k- Z. W1 f; }; O( x4 U  j' svoid Human::SetHeight(int x)
{
Height=x;
}
3 g* E  \' ?/ s/ r/ E' tvoid Human::GetHeight()
) j/ B. M, V0 U{
# D. B2 k/ U# X cout<<Height;
}
, w" ~7 t, d6 ?4 k: Y. J5 Uvoid Human::SetWeight(int y)
$ |+ j; d, j  L; o5 F. T% x7 D{
Weight=y;
}
4 k, l% g* R7 F. p/ i  |% o( bvoid Human::GetWeight()
" U& s4 M  L0 f8 H1 P- a{
cout<<Weight;
}
void main(void)
% J( f5 K4 B  m' r+ j$ N+ I{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
& ~3 o4 o" g6 E   Lee.GetHeight();
( j3 j; N8 ?. X) @0 ?8 O3 i* q8 K   cout<<endl;
   Lee.SetWeight(120);
$ `$ e* o' ?* J$ A5 a7 |+ l- U   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
}
推荐第二种写法