25.类，对象，成员实例

(@_@)

第一种写法：
$ s; q. y" q2 p7 X0 K7 X4 J#include <iostream>
' q9 X4 E0 v, q4 }3 _. G7 Vusing namespace std;
class Human
5 K7 S  Q  w. |/ ]/ N! j{
public:
void GetHeight(){cout<<Height;}
0 q; x1 ^( d" L void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
/ n( W# T4 ^. o! w* y void SetWeight(int y){Weight=y;}
, {) r. Z" F! p, @  Jprivate:
! D% J* M5 a& W% \+ _ int Height;
int Weight;
};
, X6 C1 i) b$ X2 K
void main(void)
9 L+ A2 T; \  d3 J1 N{
+ V6 x6 @+ i1 U% _4 _   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
1 M2 ~7 y! j) K8 I3 W5 I   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
) k6 n) ^/ i  Z   Lee.GetWeight();
   cout<<endl;
}
9 U) e' C  V6 L2 r7 X7 B! |1 Q第二种写法：
#include <iostream>
using namespace std;
6 P% P$ @$ ]- Tclass Human
9 @0 Z- i- z% o3 R6 f1 B; U{
7 E: X# R  U' M. v1 n! J! O2 W: Fpublic:
. Q) R! Y- B* q; |: e void GetHeight();
    void GetWeight();
void SetHeight(int x);
" m1 S9 u. c/ _6 w, w3 W3 U/ M0 i void SetWeight(int y);
private:
) E' M' ^, x! \2 [- m' _( v int Height;
int Weight;
$ W9 B+ I; }5 d};
4 v3 }8 Q* A$ n6 d2 Hvoid Human::SetHeight(int x)
{
: O% l( M8 O( L7 h1 L' V. ` Height=x;
) U7 ]) o1 d+ L& e' z; _' o. f/ O}
2 i: m8 W# f, R3 C( E% Avoid Human::GetHeight()
{
! g: W" H3 f7 I% N7 H cout<<Height;
}
void Human::SetWeight(int y)
+ a6 ~# m6 L$ i+ l{
Weight=y;
}
. z& L: E& l5 T% c* l9 _# Cvoid Human::GetWeight()
5 V# P1 h" H9 |: c4 ^$ h{
cout<<Weight;
* s7 D8 J$ R2 ?# v: k}
  ]2 E6 N; W2 j% Nvoid main(void)
  P* u' ~- v3 r- ]{
   Human Lee;
- ?. w; T% c( a5 ?8 W( W   Lee.SetHeight(172);
/ w2 B2 ^/ e3 B" ~, J( ^5 m   cout<<"Lee的身高是：";
* U, M" A, j, L4 w. z6 ]* F   Lee.GetHeight();
7 `- X$ M$ Q$ p/ C1 j   cout<<endl;
  O: t4 y1 L% k9 {& ~   Lee.SetWeight(120);
7 E) R: |5 _0 p. l+ \" n4 ~3 N   cout<<"Lee的体重是：";
$ U5 ^5 }7 u% r  E9 O( `/ u& }4 Z   Lee.GetWeight();
. ]$ E# J& S" w( l   cout<<endl;
& Q" ^5 P. D4 ^2 n7 K}
" U9 c9 w$ i7 c4 o/ V. l8 t推荐第二种写法

  w. R8 B3 j0 b. {6 O5 E1 _
( J; A% R5 P1 j  x9 e