25.类，对象，成员实例

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第一种写法：
" {8 k, J# m6 X9 z#include <iostream>
4 b5 f) U" V% q8 cusing namespace std;
class Human
{
+ W1 m- ^2 n/ G" J) Ypublic:
& u& a8 n( n% z, H8 \) K( }! c void GetHeight(){cout<<Height;}
* J2 t) t; ~" s3 k. a void GetWeight(){cout<<Weight;}
) z: F6 B" B7 x) s: A void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
8 i$ g8 U' o+ ^, T# C; z8 w int Height;
int Weight;
};

void main(void)
/ P# U* a( c; J! w; b9 l{
   Human Lee;
# A6 r) C% u. i: g2 t   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
1 W9 I3 U1 m* ^$ W! {5 V7 a& ^   Lee.GetHeight();
   cout<<endl;
5 h- G% a0 O1 f   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
- S$ H+ }8 J2 f$ d   cout<<endl;
}
第二种写法：
#include <iostream>
using namespace std;
class Human
{
3 i) I4 ~% n9 Vpublic:
void GetHeight();
    void GetWeight();
4 ?+ d7 v9 ]0 V0 N1 [) } void SetHeight(int x);
* q- T: f. |* O6 Z+ a  }2 g void SetWeight(int y);
2 a% p1 G0 t9 A1 Wprivate:
3 R) G0 w# S6 \8 i) a0 R# T int Height;
int Weight;
7 [0 f; s" q, z6 h) X};
void Human::SetHeight(int x)
$ h/ H4 I9 h( o8 ?' Z{
Height=x;
}
, w+ h/ m6 @) [& t/ _9 q6 Yvoid Human::GetHeight()
, R+ Z) E9 j$ D* J8 h+ F4 F{
cout<<Height;
}
void Human::SetWeight(int y)
{
Weight=y;
* K) _' D/ ~9 k; d& Q  |% o}
' c& Y6 Q4 I+ y* T/ `" r0 s8 Yvoid Human::GetWeight()
{
cout<<Weight;
}
1 m# }3 _6 ]+ G% b6 }void main(void)
{
/ o: \0 v1 H* e4 v6 x  R; B$ K   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
& j, Q3 [2 v9 ?6 ^' E' h, g2 d   Lee.GetHeight();
   cout<<endl;
+ ]/ ]% x1 v6 n. R3 @, M   Lee.SetWeight(120);
! M. ~' J- I# L. ]& O   cout<<"Lee的体重是：";
( f2 P4 l5 J2 L# @2 g" S   Lee.GetWeight();
   cout<<endl;
}
/ I3 g  w% j! I* G0 g: V推荐第二种写法
* ^0 K8 K4 V+ r' n6 Y7 a  n( N% e
4 q# o. e6 b7 z5 g' \