25.类，对象，成员实例

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第一种写法：
( G& G$ R7 g- Z3 k5 R/ s: p#include <iostream>
* P. Q3 j/ h& P# zusing namespace std;
. @0 x, v. D2 l! T+ q5 c5 Pclass Human
* E- r1 R2 H" R+ j8 `{
6 [0 U4 [) n/ A- r6 ^2 Bpublic:
void GetHeight(){cout<<Height;}
* d* E% V+ w& `3 o9 r void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
( W6 }4 I4 E3 U7 H5 \ void SetWeight(int y){Weight=y;}
private:
( w8 B. j# Q9 G2 Q. p int Height;
int Weight;
' s9 o; u) l8 B* q* y% S};
& Z: y; a" Y* e5 y5 B" W. t
void main(void)
- O3 j" s( z  J: v; D4 n* H; ]. C4 t7 j{
6 b$ n3 v2 Q9 g1 j5 \, M# n   Human Lee;
$ a! d) W- k2 m1 B0 I( |   Lee.SetHeight(172);
# J$ e: S9 z) L" ]4 Z. j   cout<<"Lee的身高是：";
1 @. z8 a% x$ T% K   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
9 U; X& K) s3 T   Lee.GetWeight();
   cout<<endl;
; C' R5 m* N3 ]1 p8 O& y/ v& @}
第二种写法：
#include <iostream>
3 N6 h+ l& h' a  ^8 busing namespace std;
class Human
  e+ u* Z% y, C+ K{
public:
void GetHeight();
' ?& X; E6 f$ }3 {6 ]2 W% U    void GetWeight();
6 N3 l' s5 d$ ^  a- ? void SetHeight(int x);
void SetWeight(int y);
private:
5 W, t3 N& P. L. u$ S! ]# i9 b int Height;
( s# X' F* A; s9 c int Weight;
) k( Y9 S, ^9 n0 S' b};
. z0 c  k) o  A4 b( }, x) rvoid Human::SetHeight(int x)
{
" r" A$ [! \. K4 t! [2 Z Height=x;
  s' {' Y# P  r, j}
void Human::GetHeight()
{
cout<<Height;
6 Y5 ^* t* h$ \* n1 q}
void Human::SetWeight(int y)
{
" L. Z! d6 d" Z! Z Weight=y;
7 n) H* k3 m& X" s}
void Human::GetWeight()
{
cout<<Weight;
}
void main(void)
{
   Human Lee;
' h' B/ O8 G7 `* i+ r   Lee.SetHeight(172);
4 L+ p* B- k9 E; B$ P& T   cout<<"Lee的身高是：";
) o- C. n! Q: ]   Lee.GetHeight();
5 c) L3 M; ?6 T% G$ {+ V   cout<<endl;
   Lee.SetWeight(120);
/ k% p$ G1 ]8 {% W. T4 ]0 r4 K2 u   cout<<"Lee的体重是：";
   Lee.GetWeight();
0 F' ], u9 ^* J' }' X7 K$ j3 T# b2 o   cout<<endl;
}
推荐第二种写法
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4 m, E8 O3 M6 `$ s$ g- j0 I0 O, V$ ^