25.类，对象，成员实例

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第一种写法：
& I7 I8 H8 |( _# _" w' u#include <iostream>
! \# d1 R: X+ t0 N9 fusing namespace std;
class Human
{
public:
3 t1 w6 d7 R0 {: Q- |4 U2 n void GetHeight(){cout<<Height;}
# G( \# |5 u/ G' U, [3 ~1 f void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
int Height;
int Weight;
/ o# Q- U0 {4 X' ~( O2 C};

" k6 I; L, o) h  O# A8 L' \void main(void)
{
   Human Lee;
; W: U! w% ~) @5 Y$ L- F   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
: d9 l' j/ s. M) {8 Y# w   Lee.GetHeight();
; T* v- }- T! V7 _$ J   cout<<endl;
- L1 K) k; z# ~   Lee.SetWeight(120);
- I4 H- I0 d( Y9 D# R7 A( e   cout<<"Lee的体重是：";
   Lee.GetWeight();
( Z6 X6 \9 n9 h8 U   cout<<endl;
}
第二种写法：
#include <iostream>
using namespace std;
9 f& A1 S2 ^6 i- F! s: @. M$ [class Human
: e+ g# \7 O& c, N/ a. i5 X{
public:
8 t$ U4 k" q+ n" l5 A" h- o1 o/ j void GetHeight();
4 k' I1 z2 W3 _7 E; {    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
private:
- |) h) O; G8 W* V& y' N int Height;
+ S- H7 n* z2 X* g7 s8 ~) b int Weight;
4 `" D: z8 _6 h% W};
void Human::SetHeight(int x)
{
, L6 @5 T% G; P; s% c Height=x;
' B3 c# s. w& D- t  i}
void Human::GetHeight()
) p' X2 o2 F4 D" Q  n4 h{
0 R9 T. `2 R5 N* b. E0 @5 s! h cout<<Height;
}
  k! X0 N: l4 ]; Cvoid Human::SetWeight(int y)
{
Weight=y;
}
* h: Y; ?0 x. A/ M  }void Human::GetWeight()
{
cout<<Weight;
}
void main(void)
) |( u- z' B  `1 [$ C4 v; D" `' M{
   Human Lee;
  D3 f  B# \1 ^% O: Z2 X: G   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
8 s% }4 V* o+ f4 g! o   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
# Z- `* {; B  y, s* g% @! J. `   cout<<endl;
9 p* [0 K* P$ x3 |: Z. q}
推荐第二种写法
3 B. L. C9 J2 o3 K3 Q; b" J