25.类，对象，成员实例

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第一种写法：
) B3 q. K3 s, e7 a( d$ q' c9 U. e#include <iostream>
  {. E8 z! H9 Fusing namespace std;
) S# ^9 E, P6 N1 D4 Z% V5 N7 wclass Human
' X9 f' x' z+ a{
public:
6 c. o- b. ^; B! c void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
* r9 [$ N: q9 ?) Z void SetWeight(int y){Weight=y;}
& c0 y$ d" {- L5 Bprivate:
4 K: |7 t* B) I! Q( C int Height;
int Weight;
, ?# k$ B# d4 L# k4 @  p) r};

void main(void)
{
4 m8 v; {4 D4 A! g   Human Lee;
   Lee.SetHeight(172);
& B) k2 h1 P& [4 P8 V) o4 E   cout<<"Lee的身高是：";
0 r9 d/ [$ R# K5 C4 c$ l  n7 D   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
: U! z& E+ R$ B' m5 J   cout<<endl;
}
第二种写法：
' w# _& S2 Q" k3 u* @. E% z/ T3 f#include <iostream>
using namespace std;
class Human
{
6 Q) B( K  O4 D2 W$ Npublic:
+ H: y% `. j% I  Z/ d' j  ~ void GetHeight();
- H) ~* K0 i: [% S6 F    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
6 u0 I+ N1 l# m1 e% H7 y) Gprivate:
5 T  N8 b2 R  ` int Height;
int Weight;
};
void Human::SetHeight(int x)
{
$ n5 e# e  [$ g$ B# u, l) k Height=x;
}
& \% T  }* Z5 G- K5 R" g1 k: N' Avoid Human::GetHeight()
4 n5 k) k+ D( N0 L% s+ G5 Y{
6 M5 d1 X0 I0 g/ O* p" E6 O cout<<Height;
}
  V; ^' q: T1 n9 K$ `void Human::SetWeight(int y)
% b" {- c3 l" U0 n{
8 T* r& s# r% q) y7 n6 Y Weight=y;
}
7 E, R( s) S: T) wvoid Human::GetWeight()
# w) {: [2 k8 H{
cout<<Weight;
3 A; @1 W$ f, r, H  D}
- K( W% `6 Z( O' Dvoid main(void)
{
# h+ ?1 L- z; }; H   Human Lee;
0 {9 r( |0 p, ?% y0 B  B- N) V   Lee.SetHeight(172);
, b2 o6 F5 C; H1 W8 R' y5 |* D& y5 Q   cout<<"Lee的身高是：";
   Lee.GetHeight();
8 Y# Z8 W' @7 }, `: f4 l( j   cout<<endl;
9 F7 S- Y: o7 O% j$ p   Lee.SetWeight(120);
2 {2 _5 M8 Z5 F. f% {   cout<<"Lee的体重是：";
   Lee.GetWeight();
' p$ J* e( e: ^- L  E* S% M   cout<<endl;
}
推荐第二种写法

3 k6 j; H6 A+ m% w