25.类，对象，成员实例

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第一种写法：
% V4 }7 V# @, D#include <iostream>
" O, p; f* c1 O" y* Xusing namespace std;
class Human
{
% \0 m; B3 b1 T; b( fpublic:
void GetHeight(){cout<<Height;}
2 d2 L2 W6 R. `' o4 g% Y6 N! @ void GetWeight(){cout<<Weight;}
2 N3 Y+ ?# g; o void SetHeight(int x){Height=x;}
3 W% E! `% T+ g" C3 r% M4 }3 F2 |/ I void SetWeight(int y){Weight=y;}
4 I$ p, @0 h' r/ t; f0 Uprivate:
: `7 }5 V3 x) H: T int Height;
int Weight;
+ j% S& e* k0 V4 f};

void main(void)
% g4 b! N. h- e. \+ M{
   Human Lee;
. W% D/ J! a& j3 h9 n5 a/ r   Lee.SetHeight(172);
8 P4 [2 L$ h4 B8 w+ c( C$ _   cout<<"Lee的身高是：";
- O) B) b' I1 A0 p& G: ~3 C0 A   Lee.GetHeight();
9 a/ V% x/ s8 P+ j, S8 t2 C4 I' K   cout<<endl;
# q# Z; F& s, S7 u7 L" d, {) n   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
! u6 W  B  K0 Q   cout<<endl;
# h1 H) p3 u6 e}
1 t5 f* i0 L  L. T- }第二种写法：
' Q( ^, i* \9 u# b1 Z#include <iostream>
using namespace std;
9 f+ N) Z" b1 n, h+ z( L* hclass Human
, c/ _& q0 `, j+ J& R+ W6 k{
) }) j& r& |3 b& Z6 U+ C+ ^/ Bpublic:
void GetHeight();
. M3 M0 O5 r( w    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
private:
int Height;
int Weight;
3 \* J% w. {, g5 u! ~% j* v};
4 t8 A/ i* w2 z7 xvoid Human::SetHeight(int x)
+ `9 Q. A4 A1 G  j$ q- E' p  k  ]{
. I1 F: q5 j* U7 k% E Height=x;
; D3 h) R$ b$ j/ j: t- u}
% p' `) R+ Z; {- l' mvoid Human::GetHeight()
{
cout<<Height;
}
# Q$ z/ M' J" x  O$ M/ Tvoid Human::SetWeight(int y)
# n9 q; [, G$ L; A- p{
; r, |* G+ R8 X8 {. s Weight=y;
9 ?* d. v! C0 r+ ]}
1 b" a3 [$ ]2 e+ R+ |: lvoid Human::GetWeight()
0 Z$ f9 G# R2 @# d5 m0 o{
cout<<Weight;
}
" l9 \! P( d: t0 ~' i3 Vvoid main(void)
{
   Human Lee;
0 m0 ^; {; G& o. O2 G- M" d/ Z1 H   Lee.SetHeight(172);
. P& j. ^/ O. X2 f/ N   cout<<"Lee的身高是：";
' z$ A' O! x- f   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
/ p8 ~- E, x+ i7 g  B# x% p9 t   cout<<"Lee的体重是：";
# F3 f- s! \2 p# w- u; F# ~3 g   Lee.GetWeight();
   cout<<endl;
}
* G/ o4 \, W* e" k% L& ^$ d推荐第二种写法

* b) Q+ h5 {2 m) L) A; F