25.类，对象，成员实例

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第一种写法：
! W' h6 p( y4 O1 T#include <iostream>
using namespace std;
0 B+ o6 e9 ~. w7 v6 z/ Zclass Human
( E2 J9 c0 c+ }{
" Q2 u& [" }/ R; F1 O3 d: Ppublic:
. }6 }( b) M- g  K# K5 ~/ U. x1 ^ void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
1 }. g; {' ]& B+ _) K3 Z6 ] int Height;
int Weight;
) r1 x" P5 n" W' T2 \};
6 }! Q& ^1 e# E, ~* `! L0 |  r
void main(void)
1 o4 d" y# T  G3 D, y. n; h# r$ K{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
  o. W8 Y- V  n8 C  U9 N. V2 w   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
* W. u7 V5 q5 f+ S3 c7 t2 I* a   Lee.GetWeight();
: A1 g* V/ a- p0 P5 R7 O7 p1 }   cout<<endl;
}
第二种写法：
) y9 d7 n8 e: w, q#include <iostream>
/ H/ n6 Y6 `; J- f7 w: m: s( {using namespace std;
class Human
5 ~5 a; A' g/ q{
public:
void GetHeight();
. u, {+ ]7 q# H    void GetWeight();
void SetHeight(int x);
" B. M3 f0 A: w. u void SetWeight(int y);
private:
int Height;
. j, r* Y- @; R- T; w int Weight;
};
void Human::SetHeight(int x)
{
- w9 L$ T( l. D$ V) ] Height=x;
}
2 c$ c  v5 b: ]- }void Human::GetHeight()
{
& v( g( d" q7 d, X8 F, i. j6 L1 O- t cout<<Height;
; T. W, d4 Z" a2 V7 |}
void Human::SetWeight(int y)
{
8 @7 K/ ~0 `$ y, j6 z4 \" l Weight=y;
}
void Human::GetWeight()
{
cout<<Weight;
2 J" R! \8 [! q9 o5 n0 O4 w}
/ ^0 c1 O. S& p3 {" a, e. ivoid main(void)
{
# `; ~" R" r% y* ?! J& h) R   Human Lee;
$ E3 |  u4 c, C   Lee.SetHeight(172);
9 s. P: H, ^1 l! K3 S   cout<<"Lee的身高是：";
   Lee.GetHeight();
4 x" X' T3 g" C. y% M( ~   cout<<endl;
   Lee.SetWeight(120);
1 R5 F% a$ ~& S   cout<<"Lee的体重是：";
$ m9 T- L& L2 G! C& X1 D) I: l   Lee.GetWeight();
  i* l" u, \" Z   cout<<endl;
}
推荐第二种写法
# l" S- R- X' E. D# g- }