25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
- ^: q6 @6 j( _; h& Q* Mclass Human
* C# g0 o' }6 T1 z{
0 W& i# D/ j) Wpublic:
9 T* L) _2 C- Q+ U& o void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
! Z6 b3 M6 G# R" Z8 J void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
0 X7 d" R2 i6 r7 sprivate:
0 Z  Y# q' T, J* U% ^3 G" } int Height;
6 w/ v) o+ o: J- C3 e4 [* S  b int Weight;
};
0 y- F" C& \1 T/ ^7 ^
8 ]( i# u, _8 R0 N0 V5 M9 S0 f/ G& ovoid main(void)
- c1 a7 P, |% `{
! l% [: E! k+ i9 L   Human Lee;
5 C9 `0 O5 g, i. a3 ]   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
$ `' U/ z8 m$ u9 `6 T  V2 ~   cout<<endl;
; C7 `' K1 a* n# T" s   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
}
第二种写法：
#include <iostream>
using namespace std;
class Human
{
- |1 t4 P; J7 X% N/ y) Q  vpublic:
- P; [$ _0 v7 J$ h3 t6 F8 e void GetHeight();
1 r( G% Z: Z6 v* ^5 a    void GetWeight();
/ J1 {  N5 h+ X9 T void SetHeight(int x);
: P0 l4 o# S! D0 K: q$ S# g& U void SetWeight(int y);
private:
* _; N3 w9 G9 a4 P- X$ Z int Height;
$ o( f3 Z2 H9 D- | int Weight;
};
void Human::SetHeight(int x)
{
Height=x;
" Q* j; T' w% }  d; F2 N}
void Human::GetHeight()
{
cout<<Height;
. C/ E: y$ @1 n& p: ?; `- o}
2 h8 u+ g; i2 O% E% Z8 avoid Human::SetWeight(int y)
: k) U" o3 Z3 I! r* Y{
Weight=y;
0 O% e0 K7 j2 i. H# P}
9 V/ ~' @2 |3 V' V( p7 A) hvoid Human::GetWeight()
{
cout<<Weight;
}
% L5 y" c9 x, O4 r3 B1 x) Rvoid main(void)
) @& n5 t- F# V+ W6 ^# d{
   Human Lee;
1 j# x" T; Y3 t6 y: S+ g% e$ }   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
0 k9 g" T: B9 d- _   Lee.GetHeight();
% a' v( I. d: J   cout<<endl;
7 u% |5 R3 @" S2 W6 A1 p! v   Lee.SetWeight(120);
* Q6 W7 O7 D5 h" t" t   cout<<"Lee的体重是：";
0 \# \$ ~1 y' L0 n1 h   Lee.GetWeight();
+ g+ }3 |, h8 l7 H! o  H0 m   cout<<endl;
}
推荐第二种写法

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