25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
class Human
{
' l4 [$ D' \6 {public:
void GetHeight(){cout<<Height;}
6 f3 h7 Q2 s) ]5 \' R# d- E void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
2 N7 h) t3 E9 c7 L- i& F& u' ?6 d void SetWeight(int y){Weight=y;}
private:
4 B5 h3 ]( r0 B int Height;
9 O/ X9 m# q% u% f- ^" _ int Weight;
$ G. W$ Z# r# S9 `3 ^};
" n" \5 a" N: T* b" {+ d
" B* r" k- ^. c3 f1 @void main(void)
{
   Human Lee;
6 F( H: I; U4 k   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
. ~, N5 U% s6 b7 h; |   Lee.GetHeight();
   cout<<endl;
0 r7 V- d7 d# v" s" ~   Lee.SetWeight(120);
! C: i8 J8 E# I& N   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
* a3 j- ^) E2 B, n7 o- j& O}
第二种写法：
#include <iostream>
using namespace std;
class Human
{
public:
3 @# K" w8 b2 c3 W) J- K void GetHeight();
- |2 O- ^0 z3 X( S. x  x5 a    void GetWeight();
void SetHeight(int x);
0 }; q' }' t7 \0 o0 U6 b' n void SetWeight(int y);
private:
int Height;
int Weight;
, H1 u* E% J" I3 m};
0 b$ F( Z: w, H; f* dvoid Human::SetHeight(int x)
  Y9 u, @3 U6 @7 C5 R{
Height=x;
}
void Human::GetHeight()
{
cout<<Height;
4 D" u8 G8 C. ^/ t}
void Human::SetWeight(int y)
7 \3 p) g& Y8 ^  ~6 H{
  t( w) x+ A- Z Weight=y;
! G) x/ J5 Y) ]; y}
void Human::GetWeight()
{
cout<<Weight;
}
void main(void)
9 p+ v* c" c1 R6 c{
' i' ~1 l  S7 a5 S   Human Lee;
   Lee.SetHeight(172);
* n% Y" }2 \$ n0 n0 U0 R& W   cout<<"Lee的身高是：";
% C% A8 j7 f1 n% O+ l5 Z9 K   Lee.GetHeight();
   cout<<endl;
. U& o  t! o) l- T& O/ @9 l   Lee.SetWeight(120);
4 w7 H. l: L, q   cout<<"Lee的体重是：";
3 s# h  F* q4 A. t5 o   Lee.GetWeight();
" ^6 x2 @9 g- {+ U- H   cout<<endl;
0 c! F4 s9 G  D9 \% M}
推荐第二种写法
( C. Z& K$ }, R% S3 L4 h0 R. t