25.类，对象，成员实例

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第一种写法：
; X/ R, @. ?; o#include <iostream>
9 X1 a7 K5 K  cusing namespace std;
class Human
{
4 K& T$ {  I/ x- A: x. Qpublic:
void GetHeight(){cout<<Height;}
  [& D8 M/ R/ }9 I2 i+ F0 `' x1 G void GetWeight(){cout<<Weight;}
8 ]" |1 ^; t' N& R void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
6 @5 `: d5 M0 a. l3 Wprivate:
int Height;
9 D; Y  J: N7 F* ~ int Weight;
0 w8 K: E  W: r  I8 d};

void main(void)
{
   Human Lee;
' {( P2 g3 [9 k7 P' g   Lee.SetHeight(172);
0 W( A/ j) T! g! o1 U   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
" B  r* ^& D2 ^* f   cout<<endl;
}
/ S4 x+ S! t$ K$ ]第二种写法：
$ j  X& d3 M8 g6 t#include <iostream>
using namespace std;
, b' m- B% k, O6 Dclass Human
{
( W& q$ P5 a& ~7 ~+ s4 T) I9 Kpublic:
5 R9 z. Y) S( b( x' L void GetHeight();
1 L; M, r# l8 d! |& T; C    void GetWeight();
8 A2 T, v% L: O8 o8 N$ x2 f void SetHeight(int x);
8 h" w9 v% ^5 d1 s void SetWeight(int y);
  N% J. p/ m" }1 G/ yprivate:
int Height;
int Weight;
# C* |$ Z) f- X) M: G};
void Human::SetHeight(int x)
! d' Y7 I, |+ b{
3 E6 {& [, ?7 `8 }2 Y3 s" Z Height=x;
6 A, T# E$ ?% d! ~. W6 S6 ]}
void Human::GetHeight()
- N/ A: X; r. g: R" C{
cout<<Height;
}
void Human::SetWeight(int y)
{
  L" L4 |7 H# T4 \7 r: P+ K! p! v# e! V Weight=y;
}
. m! ?8 d' N0 x! O9 M/ r* Dvoid Human::GetWeight()
8 w  q- V5 C) v$ |! i+ H{
; A- I5 N* Y9 v* K* w1 Q; k cout<<Weight;
. i, k& ~, G, K" I' i( @}
void main(void)
{
   Human Lee;
- h' t/ i: L* H9 s3 e0 @+ a/ a   Lee.SetHeight(172);
3 S9 Q/ ]" k6 ^! a   cout<<"Lee的身高是：";
. D1 _7 |* s& d; M3 Z   Lee.GetHeight();
   cout<<endl;
4 R! L1 ~" R9 ?& r2 Q) ~   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
% P- ^8 n* m' y( o, b: ?3 q5 g}
$ e6 S& _1 s+ o1 `, v: H推荐第二种写法


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