25.类，对象，成员实例

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第一种写法：
  m2 N+ k/ c) p( H: p$ O/ S#include <iostream>
9 e& I1 j1 F, tusing namespace std;
6 c) F! N+ T7 l5 Cclass Human
{
) W( u' D- ~8 f) d0 y& _/ ]) d% Qpublic:
void GetHeight(){cout<<Height;}
/ {, O6 r2 f3 H" t; a# { void GetWeight(){cout<<Weight;}
3 F8 z0 L2 D) A2 _% Y5 s void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
" y: w) q! G5 R. [) W! K int Height;
int Weight;
- I7 S* w" \5 G& K- s4 V7 X};

# u4 t- r7 ~# c) J6 V! R5 rvoid main(void)
& f9 p+ t2 S" P6 C{
   Human Lee;
  T- z& [. ]! u. x   Lee.SetHeight(172);
, M" \) L9 c( |4 _. q   cout<<"Lee的身高是：";
3 F5 y- Y+ w, P, l) a   Lee.GetHeight();
# p; I5 A/ ~* v   cout<<endl;
  o; K! e% E3 O3 z) ^+ ~   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
) E* {, A' C6 K$ f, Q7 i' G8 y: v}
3 |( C, t( o- X( |第二种写法：
2 D" j% u  R5 t3 I+ J#include <iostream>
using namespace std;
class Human
. G4 u1 u1 B7 W/ P4 a' c. m5 G" _  w7 ?{
4 N. Z# m- P) L9 qpublic:
" T- r1 R; _( _3 \7 V! f! W void GetHeight();
( x! j3 }- X& e0 t& }    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
$ O9 W* j7 F/ V; fprivate:
int Height;
int Weight;
};
+ J6 B8 E; a# Y" v' m8 ovoid Human::SetHeight(int x)
& D% l0 a, A' e0 ^: M{
Height=x;
4 O# j2 n/ {$ x; h$ J% ?6 y}
% k3 A! p) ~: W. _+ v# uvoid Human::GetHeight()
# y7 ?/ r/ U: p8 p{
' [/ {% j4 b: m# p# A9 S0 l( M" Z cout<<Height;
}
void Human::SetWeight(int y)
% P+ o( }2 t% J8 f2 W5 H8 D{
Weight=y;
}
2 |  e5 v: y' Z: Rvoid Human::GetWeight()
{
cout<<Weight;
% s2 H8 z9 q- }( i7 N}
void main(void)
. Y, O5 v  e! L$ d{
  }7 q. e) W  B9 A6 N   Human Lee;
3 Z+ P  \) K, v" D7 n+ K   Lee.SetHeight(172);
& y/ o8 A2 r2 T7 h% _   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
! x. x. B1 N4 B" C% p   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
% z/ m6 w4 V" Q6 M& ]* |}
推荐第二种写法
: B2 o, G, k5 m0 D0 i