25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
' v: |! }3 E& [; b1 tclass Human
{
' V* m  Y8 F+ C. `4 upublic:
8 M5 z$ r+ u+ H, V void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
) S0 W5 ~# b5 k. r  Y void SetHeight(int x){Height=x;}
4 o, j3 H/ Q; Q2 X  t/ q, w void SetWeight(int y){Weight=y;}
private:
int Height;
int Weight;
};

void main(void)
9 M- E3 _7 o2 c{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
, K) o1 r* C( \' W) D   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
7 ~& B+ N4 y1 q/ P' z( S- S   Lee.GetWeight();
   cout<<endl;
}
第二种写法：
#include <iostream>
# G+ ^! ~8 j, busing namespace std;
+ t' v0 c$ z, _; O7 b& y) u* \/ Hclass Human
{
public:
void GetHeight();
, {' x9 l% W7 C" A$ |6 F. W    void GetWeight();
: y* _3 H) z: q4 e& g void SetHeight(int x);
# W0 h1 V  f- {1 v# b/ z" k  r2 z void SetWeight(int y);
( n5 d/ ]( |! t1 |private:
int Height;
; G7 v. X) B# ~- z9 M int Weight;
};
- O  m% T( m* R" |9 X( k9 b) Ivoid Human::SetHeight(int x)
+ K- z% }" f1 v8 s: V{
  j2 H9 ^! s" f2 C, `4 q Height=x;
}
void Human::GetHeight()
8 \. [, s, u" t/ T- R4 o{
cout<<Height;
3 v. u) a6 t1 ]% I/ a& h}
void Human::SetWeight(int y)
% j4 P5 R2 |; t8 [3 u7 r{
) n, y. e9 t" ~$ E* L/ c Weight=y;
}
void Human::GetWeight()
% O5 p' o, U! Q  O( x{
- T# J) R! i1 m7 I1 Y cout<<Weight;
! M- ]" ]+ w. [8 C6 A& k  e# e}
void main(void)
7 D/ J* H2 j  S' [{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
3 k" Y+ Y! }+ p  Q   cout<<endl;
  w4 x. M7 W( s  ]4 c2 k   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
- F0 a& J) O7 D   Lee.GetWeight();
% E0 \2 A$ b. M7 G. f   cout<<endl;
}
推荐第二种写法
! @, c' A5 n8 I& U
9 L5 b1 v: C! d8 T1 a* L4 x: M+ S9 M