25.类，对象，成员实例

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第一种写法：
" j" a  r4 N  }9 Q5 a0 V#include <iostream>
) S5 m  ~! s: a5 `  B1 Husing namespace std;
: K5 g% Y7 M0 v6 Uclass Human
: s1 t' I- p& D( ~/ r9 P; A3 D{
public:
$ v' u1 h% s4 s: T void GetHeight(){cout<<Height;}
! P* r  F( Y9 n* w void GetWeight(){cout<<Weight;}
8 n5 B% F7 P( M5 `0 a6 e void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
$ ?. ?8 n: y- L* }  Q int Height;
int Weight;
};

void main(void)
{
7 X# b5 D9 }- b" z   Human Lee;
* a  Y6 ]- }; M   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
; y  i, Z+ d; k# u% ]$ p1 c5 o   Lee.SetWeight(120);
7 i0 g% X  J* ^- [" r9 N   cout<<"Lee的体重是：";
: G3 f, Y& H6 Y   Lee.GetWeight();
   cout<<endl;
+ g7 M( @1 F: D4 `}
第二种写法：
4 d, E$ A1 W  Q#include <iostream>
/ N' s- [% L( O$ l# T5 b3 uusing namespace std;
class Human
{
: p4 I+ S6 Q& wpublic:
void GetHeight();
* {8 T7 Q. |- _' {! I    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
private:
int Height;
3 L! i/ S! d7 p2 t3 | int Weight;
};
% o7 r0 p1 c) H4 k4 J4 h& Dvoid Human::SetHeight(int x)
/ j6 P: v0 p3 ]; S% r{
! p3 V8 p  H3 Z8 R Height=x;
}
void Human::GetHeight()
{
# x  a$ V( L( G- X! m( k' B cout<<Height;
}
void Human::SetWeight(int y)
$ W" p1 ~$ W7 z1 w3 _9 B9 L{
! I  c, @1 Z6 R+ l' ]( ^ Weight=y;
: r' J8 L9 {2 s- z% [! ?0 W}
void Human::GetWeight()
1 T6 p0 O4 a, t- [{
: @) N5 q3 X3 ?: M0 j) }9 n cout<<Weight;
}
void main(void)
{
% r$ Z& Z4 ]" h& m$ A# ?* |   Human Lee;
   Lee.SetHeight(172);
( [; d" s/ ~4 _! K9 Q# Q1 A' z) X   cout<<"Lee的身高是：";
/ G0 A, z" c6 g2 ]1 _4 b' K- G   Lee.GetHeight();
   cout<<endl;
4 ]- T) ^4 v# Z) c. W   Lee.SetWeight(120);
) \( e/ T1 r1 w   cout<<"Lee的体重是：";
$ P) o# N5 G$ u" j$ f( U$ V   Lee.GetWeight();
   cout<<endl;
+ j6 I# |; k- m* O4 ]1 R}
! P7 V, h( R( @$ z$ }4 B! R推荐第二种写法
4 m# m. t2 c' n) K