25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
class Human
{
public:
void GetHeight(){cout<<Height;}
0 Y6 Y4 A# Q! f void GetWeight(){cout<<Weight;}
6 ^, {3 E" Q' O1 | void SetHeight(int x){Height=x;}
7 P" C+ r- b1 r8 @2 W7 v+ W void SetWeight(int y){Weight=y;}
7 F) c  z( H  L' a& U) Y' Y1 Q$ a/ Z8 t7 h7 fprivate:
int Height;
int Weight;
};
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7 H8 E) m4 `; Wvoid main(void)
{
: p2 h! c1 y! \3 O   Human Lee;
( U# A3 r! ]( q" ~! w   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
. K( D+ D+ U; R   Lee.GetHeight();
, _. L0 M; n1 G/ R0 m/ ~   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
2 B. s+ T5 e) A, ~9 Y   Lee.GetWeight();
   cout<<endl;
- A" s% F6 {6 u- \1 H}
1 C7 y) p. H9 }. C5 h  Z第二种写法：
& u! r2 @$ `0 `# J" K. }#include <iostream>
using namespace std;
! X: h7 v& Y  N/ Y7 S1 G$ \2 t+ Yclass Human
; |# }- i# c" F. g/ s# O{
public:
, M. g4 N% F$ d* S, N void GetHeight();
    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
private:
int Height;
; F7 L+ B; o9 Z+ w int Weight;
1 t1 e" a( w  q- m1 s# e, d2 E3 h};
" ]; W, d( e% g: G( S9 D. avoid Human::SetHeight(int x)
4 K$ c: b) i7 a, g{
+ K: N2 l2 E  A$ ]+ a) o; I$ F4 o Height=x;
}
  A, I: O( Q2 Z2 ivoid Human::GetHeight()
6 a2 G4 k( J! t' N- n$ ?" n{
cout<<Height;
8 `! e4 }; x* A}
void Human::SetWeight(int y)
{
: ?- ~' E4 b' C0 k6 } Weight=y;
. a* V. O& \" u6 {+ {}
& j0 g; `7 j( Y, A. D$ a, \void Human::GetWeight()
+ E- e/ P+ E2 ^{
cout<<Weight;
7 e7 }0 ]4 d; T2 A+ f}
void main(void)
" r6 C1 V2 p9 b" {, Q: O; j7 h{
   Human Lee;
; C, P# @, y/ c) F+ R! f8 p   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
. Q+ r2 `% l  \2 W, D: A- |5 G   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
5 h9 z, D0 y: }   Lee.GetWeight();
6 V# Y8 ?# A; _   cout<<endl;
% {0 \0 ^0 W: D2 N}
推荐第二种写法
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2 p' l( j' I  `$ @, g9 h/ g" M