25.类，对象，成员实例

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第一种写法：
#include <iostream>
7 `+ M# S. l  _; H) \$ z; f& Husing namespace std;
class Human
{
: N& _) i4 w0 D( u9 ipublic:
. Q/ s* j6 v: _ void GetHeight(){cout<<Height;}
- H6 _. K$ [  M; `. T+ _) q void GetWeight(){cout<<Weight;}
" x# n1 Q$ W4 G void SetHeight(int x){Height=x;}
' j% v! L1 x$ s void SetWeight(int y){Weight=y;}
private:
; S, ]0 f# _+ Y int Height;
; y0 n. q  q" q( Z9 m9 I int Weight;
};

% ~" D! E8 f, h" m) W; Avoid main(void)
& l* q" W4 d, r/ `5 s8 y3 ^{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
& ?5 H( ^5 I6 T  [6 C7 s$ c; b   Lee.GetHeight();
   cout<<endl;
6 o3 b* g6 G+ l7 d5 q; |* O9 B. n   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
% h" Y" c1 q7 n; I; @4 x   Lee.GetWeight();
1 f# c4 G' x: ~' \3 I  J0 j2 O/ E  j   cout<<endl;
& q5 g& L. Z$ @) l, j1 O}
第二种写法：
7 f) g- S3 p* {; ^#include <iostream>
using namespace std;
class Human
{
  {% S. h6 r( D- V4 [% Q& Dpublic:
void GetHeight();
/ \) p& V) O& [! @& a9 U, ^7 p    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
: n2 P) B7 I# M- N# k+ A- kprivate:
int Height;
, Y+ _* m9 r/ t8 U0 ?" D int Weight;
3 c0 U7 ^3 X% c- I3 W};
void Human::SetHeight(int x)
{
* m0 S. N% E/ H1 O, H4 [9 K Height=x;
}
7 ~+ ]; I+ z9 M- O) Bvoid Human::GetHeight()
{
cout<<Height;
& R( ^* H1 P; C6 T5 S5 x& D}
void Human::SetWeight(int y)
{
Weight=y;
! X! e3 {& f" L, x- i& |5 T}
- A8 I" o& ?6 V+ a; s' g: Jvoid Human::GetWeight()
5 t* P' T9 b* d/ A{
9 W+ X) q, d. t cout<<Weight;
}
void main(void)
5 F: e$ R1 }4 Q& Y2 r2 N{
   Human Lee;
! C' h0 f4 d9 j4 R4 Z9 M- g   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
% u. w0 ]2 D$ a   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
* S+ Q5 N6 d' ^; X   cout<<"Lee的体重是：";
; d) I; M4 x* G' D   Lee.GetWeight();
   cout<<endl;
}
9 n" b2 e& b% v8 L推荐第二种写法


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