25.类，对象，成员实例

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第一种写法：
#include <iostream>
' {  m) U) e# Y7 d, T4 Nusing namespace std;
class Human
( T5 Y, a% h3 d% {# a{
' b. n# i* N/ X- {5 ^6 Opublic:
void GetHeight(){cout<<Height;}
2 h% g; v, i. l9 M  f+ Y" V void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
int Height;
' v8 e# i1 f# M1 y int Weight;
};

' O6 c9 H3 S$ K  L2 ]9 Z* m# X! Wvoid main(void)
! w/ |3 K8 s# q5 H  `# e; }{
   Human Lee;
' v3 O; x' H* {   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
6 R- I3 C5 k, [7 {( O   cout<<"Lee的体重是：";
# @+ t. r$ C8 r+ B, A! A0 S, B   Lee.GetWeight();
   cout<<endl;
" V  G5 W( @/ m& F0 H9 e}
  }5 s! r7 M: f6 {, n第二种写法：
#include <iostream>
using namespace std;
class Human
{
public:
( w0 a8 M4 ?: U% T+ w void GetHeight();
    void GetWeight();
4 Y  E: f- ~8 `8 Q! _  i void SetHeight(int x);
void SetWeight(int y);
  H# J1 f, k  m+ Hprivate:
& g: g" C& E3 C9 \, M$ n: Q9 E int Height;
int Weight;
};
) X( I& z, I4 |/ @void Human::SetHeight(int x)
) j9 L) d( G5 a/ G{
Height=x;
}
  s, e: U& K! O; bvoid Human::GetHeight()
1 E3 i9 x; ?/ u/ ~6 B5 N0 S7 f{
cout<<Height;
}
) H' U( j3 u: Cvoid Human::SetWeight(int y)
{
Weight=y;
( F% G- l) a, |: n! K}
) |3 m$ n2 p* v. v: x" pvoid Human::GetWeight()
{
cout<<Weight;
}
void main(void)
{
9 D* E7 @* `, L5 P: J, P' ?   Human Lee;
$ \, b) p7 z1 l9 c% t3 e   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
8 R3 n  d6 z" D   Lee.GetHeight();
) D/ ], i) S9 }: ^- [" K   cout<<endl;
9 S9 w, c+ U- k- z0 \9 g" x9 h0 a   Lee.SetWeight(120);
, r$ {; T8 L- c2 N+ P$ z   cout<<"Lee的体重是：";
   Lee.GetWeight();
( R+ c# l3 n! b* d0 R% \   cout<<endl;
}
/ _, W* s) U/ ^推荐第二种写法
: B9 O5 W$ z2 R- h4 {
1 u+ Z! Z" A4 B2 F