25.类，对象，成员实例

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第一种写法：
/ D4 e, \& ~# B, O8 m#include <iostream>
using namespace std;
& K2 e& s* U( S( v$ U+ kclass Human
2 Q! m$ M# N0 O: r8 V2 F{
. n4 j9 P' I2 j' _; }$ Z1 w, P; kpublic:
0 s; D& H. U; \, C6 z; W void GetHeight(){cout<<Height;}
6 S$ g+ C1 E* D6 n' B void GetWeight(){cout<<Weight;}
3 Q% Y9 u0 g1 p0 T: d void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
int Height;
$ I- ]5 S& {' k" z& n- U' M2 w int Weight;
};
4 N7 b0 U: q- T/ g% V1 R
, ]+ D) y6 T6 Q) Q- n9 Z. @void main(void)
{
   Human Lee;
. J7 _: P" h0 L" _* k   Lee.SetHeight(172);
2 y! e! V( |' H! j   cout<<"Lee的身高是：";
   Lee.GetHeight();
: p2 |$ p3 d7 u   cout<<endl;
  J1 }4 z/ ]- K& t; a* g) z, V   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
. N# @4 B% A3 B& f+ v' v4 f' t   Lee.GetWeight();
   cout<<endl;
4 ]" M  C3 E5 u; F  G5 Y# m8 z: N}
第二种写法：
+ J3 `, R7 R2 c9 k7 l#include <iostream>
using namespace std;
class Human
/ R1 A  a2 C+ a{
$ O# U1 L/ l% r1 dpublic:
void GetHeight();
) [. G& L, F/ D    void GetWeight();
void SetHeight(int x);
) ^0 R% _5 B4 Q" p8 l void SetWeight(int y);
! P6 a& g; j3 p4 ?  ]private:
/ L- i4 F3 Q) E/ Q; k int Height;
int Weight;
8 a6 O  s7 q- a, S  o0 I* N! Q% ]+ j};
# }) ]. T& K  r5 Y$ Fvoid Human::SetHeight(int x)
9 e/ b8 @. Y' z% p3 _4 c* N" E  X{
% N; l4 C: W3 u! O0 W Height=x;
8 q$ o( v% A0 [6 T& j3 G+ ^}
3 v$ ^9 K0 e* U6 Lvoid Human::GetHeight()
{
+ C% L3 U5 _' \7 `  S cout<<Height;
}
void Human::SetWeight(int y)
8 E- M- |( m  y/ ~{
1 S6 }) Y* K6 |& e& ~- E Weight=y;
}
, G5 L5 \6 m- |7 u' N. N$ @void Human::GetWeight()
- p" y& C) y2 y/ `. h7 H) U{
cout<<Weight;
}
' ]' q* x- h0 a* z- ]$ Z. zvoid main(void)
{
   Human Lee;
; |* _( _$ t+ b: ]3 n   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
9 z0 u  z5 Y/ ^0 P6 C1 V* _7 G   Lee.GetHeight();
   cout<<endl;
4 S" h$ j2 f0 ^: S   Lee.SetWeight(120);
5 t5 R; M2 A% O' J. m! |6 _   cout<<"Lee的体重是：";
   Lee.GetWeight();
! W; E: j/ r# l1 ~   cout<<endl;
}
推荐第二种写法

( m0 r& H0 ^! X! O