25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
class Human
8 j8 n8 h/ q" |3 N- ]" u% t/ A{
: P9 m4 K1 Z& U. x. |3 Mpublic:
$ {+ @) B* m* [6 r# a" E8 j6 }7 b void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
) ^. i+ F' w* c3 P, x5 cprivate:
! R/ c. S7 w6 R int Height;
; G) p7 |8 l  u int Weight;
};
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void main(void)
{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
8 Y) L- Z6 H1 a- K+ ~7 b: R4 V   cout<<"Lee的体重是：";
   Lee.GetWeight();
1 N% j6 M" T5 w# m5 r: B7 b   cout<<endl;
}
第二种写法：
#include <iostream>
using namespace std;
/ b9 N. y# Z1 c/ uclass Human
% d3 t$ A4 R1 }1 q4 z( |{
public:
7 z4 ]2 Q2 R0 n( k+ w! T void GetHeight();
    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
private:
( o3 \+ g/ L4 t- N( g int Height;
3 O& C0 Q1 k! I4 D* _- v: @ int Weight;
- r) h0 [6 M$ x% S# C" U};
void Human::SetHeight(int x)
{
7 C, @5 W. [' o$ k$ X$ T% @ Height=x;
- V3 ~1 X3 U6 y7 _' G' `}
3 K2 c; H& I8 [. E2 v- cvoid Human::GetHeight()
{
+ _  U# @1 l# F4 L* S7 D cout<<Height;
}
void Human::SetWeight(int y)
{
* z) _0 G2 |( O6 G# u( W Weight=y;
9 v0 o* w5 ^- s: k& Y6 X7 ~' Y" N}
5 a% ?: _* t# i( U: c/ [& T- ^void Human::GetWeight()
6 m1 S% R4 h' l+ j( j1 L{
cout<<Weight;
}
& v$ s& W9 b$ k( |$ J& c. Cvoid main(void)
8 r. _" ~! Z* M. \% D/ j% }1 E6 f{
   Human Lee;
/ B) r/ }9 ], g" ?! o2 b/ ^& [   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
1 r! ]+ [4 d. V   Lee.GetHeight();
   cout<<endl;
1 [4 A/ x$ l, ?8 b5 Y   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
. S. Y$ [. l: I) s% S' q   Lee.GetWeight();
) o8 C: o8 A& C' G0 K3 `0 C; j$ U   cout<<endl;
( P8 w: o" I/ C( X, h/ ^}
推荐第二种写法
1 {  @6 v* U, C: F4 W' d
. v  U* p0 O3 d5 ^