25.类，对象，成员实例

(@_@)

第一种写法：
: T" `& ~6 o- ]1 Z' [8 L#include <iostream>
* N( [' m' H5 i' y2 M* }- cusing namespace std;
4 C; }8 _4 }, g+ X, Eclass Human
{
5 k8 P- b! s5 E4 O! c8 |public:
void GetHeight(){cout<<Height;}
* }' r3 G* K- \0 W4 i0 E void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
" h2 l- M# U3 U& ?+ f void SetWeight(int y){Weight=y;}
1 z- w% s% t5 @private:
3 \) G, K" `0 P int Height;
int Weight;
( Q* k( k/ Z5 d) |  n& z) D};

void main(void)
{
: }: I! T" ^+ P# n- e3 Q2 M   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
6 M6 c% r2 R, v, O   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
* j; m# Q1 \9 @* w" Y, C. }}
0 O1 b; W- ^# N7 y" h第二种写法：
#include <iostream>
& V& B0 ?& H; u4 e0 a+ |using namespace std;
, K" m% H% h$ D) S& oclass Human
{
# W1 F9 `' M9 t2 O  ipublic:
8 t" ]) y8 ^& w( s9 \' O/ c) C void GetHeight();
. B. }, g- N# m, q$ [1 `    void GetWeight();
void SetHeight(int x);
5 J3 G% N  O- B9 k4 h void SetWeight(int y);
private:
6 p5 K. R8 {) z: A1 s int Height;
+ t2 H0 F3 q5 Q) V  H- T. z int Weight;
- |0 v3 e  F2 _8 W3 p1 C};
* x3 m* V9 y; Avoid Human::SetHeight(int x)
{
5 @* ^( g: W9 p; Y, G1 @2 m( o Height=x;
}
8 Q6 w/ _- m2 C3 mvoid Human::GetHeight()
4 ~1 z3 v' q6 U6 ^( P4 f) T6 Z{
' Q) u! a5 l- O1 K cout<<Height;
) l- N) c  A6 Z}
4 }9 X- R* _; U5 S1 k% z4 Mvoid Human::SetWeight(int y)
3 ]5 h' s' E4 @" @! X6 I! c' W8 T{
/ ^0 Q. _; x8 A! F- L, j Weight=y;
  n$ g" O: S8 j}
void Human::GetWeight()
$ ?! j4 }; T2 x{
cout<<Weight;
' m3 ^% U# @' F% g9 S) X) w+ i/ \}
void main(void)
{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
: N6 ?. `  S/ B5 x   cout<<endl;
   Lee.SetWeight(120);
4 n  _7 N6 u. e4 A  W   cout<<"Lee的体重是：";
   Lee.GetWeight();
5 ^- t; D  c: P9 b% {   cout<<endl;
}
; `, Y. T" q! S/ K. k+ w推荐第二种写法