25.类，对象，成员实例

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第一种写法：
$ }0 f, t! s6 G3 m" N# i#include <iostream>
using namespace std;
6 E  {+ ~7 Q4 w# h- K" h; E  vclass Human
" A6 J2 g2 W( |) P, t) }' l/ g{
* T* j  T* d# p! R+ {public:
" B% Q* l7 @& I/ ^+ H2 U6 K void GetHeight(){cout<<Height;}
) v& m0 t$ |7 C1 v5 S void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
! O( M0 Q3 P! d, H% E5 r: [2 ~0 ~ int Height;
" h/ h8 K. m7 D; z0 k$ d4 L int Weight;
};

void main(void)
9 r6 {  _6 R6 L! G! o{
/ M4 [: ]! F7 ?   Human Lee;
. e3 X* S7 p" x$ f$ e   Lee.SetHeight(172);
; L; [# U: x3 X8 d# \5 I4 U% K& }* A   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
) S; u* H: l5 d; z- L   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
; q1 y8 @( q  m* a2 a% _   Lee.GetWeight();
   cout<<endl;
}
) v9 i% E. V$ v7 W3 g  O- M第二种写法：
1 e, S5 h3 _" E2 A9 A1 _#include <iostream>
using namespace std;
2 ^; E% A% E+ ~& {  bclass Human
{
public:
void GetHeight();
# M1 O8 k8 O& l  j7 ?: z    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
private:
5 v& C( ~1 e3 g$ j int Height;
, S5 _, y8 W+ \% C' r int Weight;
3 D2 D8 e3 a- o- f. _7 t};
! I5 X) `8 e$ [9 ?! ]0 Bvoid Human::SetHeight(int x)
- b0 e+ d1 t3 r, v6 U& g0 }{
Height=x;
! d+ L9 x: _. h/ Z}
- D' {8 f5 P* }" z0 ?void Human::GetHeight()
{
cout<<Height;
}
void Human::SetWeight(int y)
- @; v7 r, B* _: G{
  B# o2 m: K4 o1 S2 y/ G# a Weight=y;
}
: l# E8 L( Q  z5 k8 `7 Wvoid Human::GetWeight()
  G7 J4 U$ j9 m( [{
cout<<Weight;
; E9 |+ L- L  B" ^}
: m  o5 s& a& G% svoid main(void)
; x7 T$ Z# l; h{
" `4 U- }) Y7 x( i) ]8 a   Human Lee;
8 f9 I9 v/ f4 X* S4 k: k   Lee.SetHeight(172);
5 x& y) N, F& _* y   cout<<"Lee的身高是：";
1 {5 k0 E1 `6 p0 c! {5 h+ k' v5 t   Lee.GetHeight();
! n! |4 F" g* j   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
}
# ]1 v1 u. G  ]" C+ a8 K$ h推荐第二种写法