25.类，对象，成员实例

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第一种写法：
#include <iostream>
) r" K. ~3 [* C* r+ husing namespace std;
8 r, _" I* f) Nclass Human
{
1 t* P" P* Z) k6 Q. g# j  v6 kpublic:
% \. O; l2 D/ i! |$ a9 [2 u void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
  a  |3 \3 M5 v0 @2 v1 M void SetWeight(int y){Weight=y;}
private:
% f9 X% W% b$ s. N) h  s+ \+ F/ K* t int Height;
0 c& Y! P1 \/ l/ x  d int Weight;
9 i% K1 [/ c/ U, k  ^9 ~. Z0 b};

4 ^, b2 o/ G+ G- }0 |5 |void main(void)
% a2 _% Q# Q) J; }: h% e; C{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
0 r3 \5 R' Y& s   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
- G# l7 O3 c% r   cout<<"Lee的体重是：";
; O+ f4 G$ s2 p. i   Lee.GetWeight();
; ^* e) O6 E, A+ t7 M   cout<<endl;
}
第二种写法：
5 X' o$ p2 ^( ^7 I9 s#include <iostream>
) @2 q& F5 A/ I  s5 Rusing namespace std;
  i: d( v* H$ r( rclass Human
{
% k1 S" |5 l7 K' npublic:
void GetHeight();
: Q8 z( ]9 l0 u. m    void GetWeight();
+ C- q, {( D3 u7 J2 V# H# D void SetHeight(int x);
void SetWeight(int y);
private:
int Height;
, \1 F" [0 m7 }3 S& v int Weight;
};
void Human::SetHeight(int x)
{
Height=x;
1 Y  L$ b! x2 `6 ^$ M0 I}
3 G% j4 S# l/ ^  @- Kvoid Human::GetHeight()
4 V4 t- q6 e; l/ |: p; k% l. n9 Z{
- U: J: A% f4 R6 d, h cout<<Height;
}
void Human::SetWeight(int y)
{
Weight=y;
}
void Human::GetWeight()
{
cout<<Weight;
8 e/ p8 g4 O  U/ B; j" S}
void main(void)
{
   Human Lee;
) I! f0 h' Y% X$ U   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
' p' R5 t8 W3 }" ^- o( ?% h   Lee.GetHeight();
   cout<<endl;
# `1 N! b- x: d) s) o   Lee.SetWeight(120);
* o# s: t! L2 H1 W2 l   cout<<"Lee的体重是：";
   Lee.GetWeight();
' k1 @% u! V0 g( `   cout<<endl;
}
推荐第二种写法