25.类，对象，成员实例

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第一种写法：
( L  H" j" j# W7 k#include <iostream>
using namespace std;
class Human
{
6 ?( X, g. I2 q1 b  \public:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
3 u) s/ @3 u9 W' Z void SetWeight(int y){Weight=y;}
9 X0 V: z8 O5 W  F5 H* U& r6 fprivate:
+ t" A  n2 T2 w# t, t int Height;
% T- T" }0 y$ v$ e int Weight;
7 j) h# i" ~2 g1 A};

void main(void)
' v% z! M- r! t) y5 p7 R& d" l{
" ~3 ]& K" |5 A3 n1 D. _# b/ ~   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
; a- u% N" v, g  D/ J5 |1 W; m   Lee.GetHeight();
2 W" }% f$ d; L9 A' E   cout<<endl;
" X* D0 [% a0 o1 o   Lee.SetWeight(120);
* g, P" J4 q) w   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
- \7 c  O+ Z( S3 u8 ^}
第二种写法：
#include <iostream>
  P) v4 V/ a4 `8 ?- V* Y5 y0 Nusing namespace std;
class Human
  O: b# @) T# I% [, o) ^4 z{
2 d6 B& ]4 [# {9 u2 k( S- w7 s" upublic:
( q8 D( b8 D$ u) |$ ~; \- b7 B void GetHeight();
4 }( I! j4 A; }4 b8 B- @3 Q) I    void GetWeight();
void SetHeight(int x);
1 j+ X0 }' p8 p void SetWeight(int y);
private:
int Height;
5 e8 y, |9 x6 f& U+ G int Weight;
! s. u* N" s0 V" |) j8 O9 M};
void Human::SetHeight(int x)
# F0 w. g, s! B- q{
Height=x;
, `& p9 X( r* D& u}
) M) t9 X! t) H! p& Mvoid Human::GetHeight()
* X' f  L" J9 J; K5 e{
2 n0 n( o) C! S) ]0 B8 D cout<<Height;
}
void Human::SetWeight(int y)
{
5 V: D: Z0 n7 F  X3 W- N Weight=y;
}
void Human::GetWeight()
1 z% F7 S2 r5 \. T: l, w{
cout<<Weight;
}
void main(void)
{
% R& ]3 _( [) O. z   Human Lee;
. r1 N; n9 Q! l! Z   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
+ U1 l  S0 e0 D. T- J+ }   Lee.GetHeight();
   cout<<endl;
9 j$ v' @* D5 ^) U   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
* T  j! F2 e7 P8 k& B   cout<<endl;
}
推荐第二种写法
9 D  i1 R. \1 o2 }& c- r
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