25.类，对象，成员实例

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第一种写法：
& A2 s! k- c! V/ `#include <iostream>
using namespace std;
' A; C' x  w2 r, \6 M0 I+ Pclass Human
, J: \& {+ G0 b" J. C, `6 O& p, n' U{
public:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
$ n$ }: X$ D4 I( X' @ void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
- h& |4 Z/ U* e4 I" d2 r, U  ?; Gprivate:
int Height;
int Weight;
};

void main(void)
{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
/ o7 o) @% g' U' g5 t7 W   Lee.GetHeight();
9 K7 W0 x6 k, D- L& q# y   cout<<endl;
' i2 f' E# |0 S3 _6 ^) A   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
  x: x. k( O1 c& A. p   cout<<endl;
( @' }% ]$ p/ e' v, _}
第二种写法：
# y  r- c9 I1 x: e8 W, u#include <iostream>
using namespace std;
class Human
{
public:
( X! w: i& f3 X# C# m" P7 j void GetHeight();
( O$ A! E- V- v$ a  A    void GetWeight();
( b* q% L" E4 |9 x# n1 _5 c6 S# e' B void SetHeight(int x);
9 N+ X, t% @; [! M% c void SetWeight(int y);
private:
% v; N7 x! O" M8 { int Height;
7 G. N- D. V, c' p" \7 U int Weight;
7 U1 {) i, `& L" \};
void Human::SetHeight(int x)
{
5 J( S% p- G8 B! T/ A& o; _ Height=x;
: W1 k1 ^0 l4 g# h; `7 g$ `}
9 i$ _, l% v0 c6 X; ivoid Human::GetHeight()
5 c& O3 v4 W0 V{
cout<<Height;
4 W/ E$ g. y5 k  x1 G+ J0 u}
& F7 g) f  o, W- X+ A( X6 `5 z4 ?: Lvoid Human::SetWeight(int y)
{
. d0 C7 ?( q: g7 t" d7 @  \ Weight=y;
}
6 e; ]% A8 ~- H) u# Z- I  svoid Human::GetWeight()
{
3 M7 y2 f' x/ P# t  o cout<<Weight;
}
void main(void)
6 a+ ?  F+ ?, f+ L0 Y  r3 t{
   Human Lee;
9 u* e* O4 B$ f   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
: Y7 z, J3 P6 O5 |7 [5 l$ ]   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
; A# M! A3 z0 O   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
}
推荐第二种写法
3 e+ R6 w' [/ p: i" u

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