25.类，对象，成员实例

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第一种写法：
: s$ ?6 @- `9 m$ K  k# j, }9 R, `+ l#include <iostream>
using namespace std;
# ?) ]: V7 {. O- H! Hclass Human
6 W- k9 C3 P" |2 G$ ^{
% ]- O/ m/ I. s2 y/ F: H2 _2 Npublic:
9 y1 L% A4 [" c0 ~2 h void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
! k. `  _* x1 r) y" m void SetHeight(int x){Height=x;}
5 r5 ?- f# u9 G/ W' _8 Q# g void SetWeight(int y){Weight=y;}
' k) b( J, j, _* y' rprivate:
int Height;
int Weight;
};
! \: y2 a; U% q! g  o& ?' M1 T8 \
, p* F* Y2 H) K, s( `" H2 gvoid main(void)
; b0 G% b7 ^" L7 }  ^{
$ N4 h: q. O, i. e0 H   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
/ V+ H! ~3 {( {' A' K   cout<<endl;
   Lee.SetWeight(120);
: X  w0 ^( G" T5 r, D* j& `   cout<<"Lee的体重是：";
   Lee.GetWeight();
, v# U& g) @9 g. E( ~" P   cout<<endl;
7 N, M( ^6 [  w5 g}
1 G/ f. s5 m: a第二种写法：
' s- B! f; m" O& a#include <iostream>
using namespace std;
3 p# |. v% |4 ^; Cclass Human
; d) `5 p  _. ?7 x4 E& o{
$ l5 w4 ]1 e. M% Spublic:
6 S. M! _0 V7 q void GetHeight();
    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
private:
  R1 `; w2 C8 U6 p$ } int Height;
) I- K* c5 _% R$ `, X int Weight;
1 k# H* C2 R2 v# w7 Q};
void Human::SetHeight(int x)
! g4 w8 z8 e3 C) d{
( j# `( m7 a" R# W1 u Height=x;
5 I, ?+ i) U0 s. B6 U}
) M/ e1 n3 c2 S% dvoid Human::GetHeight()
4 S: U* f; A- U) d( e) j" {{
0 T( n3 J" {! Y3 K3 o' m cout<<Height;
}
void Human::SetWeight(int y)
% ]  s# ^- q# ?& ^! [" k6 F5 h1 a{
$ A; Y5 A& h  d( u& r$ p0 C! b9 O Weight=y;
}
! v, ?+ h1 ~* {/ j: ]5 a: \3 Wvoid Human::GetWeight()
: l2 R) O( x( J7 h, `' o{
cout<<Weight;
}
6 h! N9 `; E3 Fvoid main(void)
{
   Human Lee;
6 T: Q8 S1 d; ]7 x: v2 K8 w3 ~9 E   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
) t1 P3 U3 A( Q# ?( Q/ s( S, t   cout<<endl;
" b; F, O% H/ r   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
4 X7 ^# H4 Q" h. l8 W" t2 g   Lee.GetWeight();
   cout<<endl;
}
推荐第二种写法

% S2 W% e: q5 ^, j