25.类，对象，成员实例

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第一种写法：
#include <iostream>
1 N; Y7 Q4 @9 ~/ v& K; Kusing namespace std;
class Human
  v8 [: C9 h( x, Q5 {1 M% G  {{
# a; A( J. O. |" x, T+ K5 Xpublic:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
; f5 h& L3 Y3 w) M void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
6 [) E& x7 g5 ?6 x+ N% M. v: g. @ int Height;
6 R0 U. I2 ?8 _5 T3 _* ~! S int Weight;
& Y: R. b! A1 ]" L. X};
4 y( @  K# f" R5 I3 I, x8 i0 U
4 R8 U( o* a, i5 G  V" Evoid main(void)
{
3 S- m- I( m; E   Human Lee;
   Lee.SetHeight(172);
. q2 \9 O+ U4 e   cout<<"Lee的身高是：";
' p/ ?: X  ]- z2 c/ {   Lee.GetHeight();
  t+ _* \+ O9 H% A! w( z, {: L   cout<<endl;
2 C+ n8 y4 F4 C4 Z6 T9 E( ]9 w- E   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
: G& a4 U! ?$ o* k   Lee.GetWeight();
& F& m, M6 v  t) W   cout<<endl;
- [9 y9 a) t9 n' |}
第二种写法：
#include <iostream>
using namespace std;
class Human
{
' Z# f2 J# }8 P4 I) Y1 dpublic:
9 Q8 d/ @/ x8 y* a3 Q9 u6 s void GetHeight();
    void GetWeight();
* ?' W4 s; O5 O! S void SetHeight(int x);
- s2 o/ Q" v$ P& x2 b7 F9 \  _& ^ void SetWeight(int y);
private:
int Height;
, g5 p7 G4 L& I, s. { int Weight;
};
% O. _; j* B! nvoid Human::SetHeight(int x)
{
8 H! f5 {% E8 ]1 T# S0 \ Height=x;
}
void Human::GetHeight()
{
# y" ?- q" Y; D0 f; v cout<<Height;
}
void Human::SetWeight(int y)
4 E; [2 R# q! y. _9 K- U% e{
Weight=y;
}
) G6 v4 `. r7 xvoid Human::GetWeight()
1 q7 O/ t! P$ y8 r" X* I{
cout<<Weight;
- C4 b7 n0 G3 l& Z}
2 f2 ^6 {; l/ s3 s" avoid main(void)
{
* a9 I% M* D$ O   Human Lee;
+ J; K& f/ M* e* l% Q8 u   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
0 S: e' k- {4 w: |, F   cout<<endl;
   Lee.SetWeight(120);
3 G) O, z4 }* w* H   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
}
, d& Y3 Y& w) ]. ^+ ?* `3 |$ s' {1 j推荐第二种写法

3 b; U6 l1 j) C% a9 ?
4 T' Q* A: O- x0 c. _; W