25.类，对象，成员实例

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第一种写法：
#include <iostream>
5 o( ^+ S' c0 W8 a, X8 B$ Ousing namespace std;
class Human
{
- v7 r  l7 h5 w9 T7 b- k) z" |public:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
8 \: v9 |3 _$ r' U6 P$ c1 wprivate:
+ y3 I2 C0 `, i" l2 L int Height;
int Weight;
/ G  p) P. O1 `( w/ x5 m8 [};
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6 o: }  S6 T! `/ J8 A- Fvoid main(void)
{
   Human Lee;
/ K0 X0 h+ G# I, L3 q' E7 o   Lee.SetHeight(172);
3 [, }2 Q' M; c- V   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
' Q$ r1 q9 \; d# M. u   cout<<"Lee的体重是：";
# S# @) c& J" z  k# i   Lee.GetWeight();
   cout<<endl;
6 N/ a0 q1 n9 u( y. }; _}
第二种写法：
+ a; N: ^8 _2 }% W6 X#include <iostream>
0 U/ Y9 V) [& }using namespace std;
% m. w9 R& k" l  ^. Wclass Human
{
public:
% T3 e/ ?. C  w! t5 A0 c0 ?4 [ void GetHeight();
$ _8 e/ Q! G9 b* E' T    void GetWeight();
* M0 x8 Y( O+ p9 Q  V3 A( O( E. U! V# C: Q void SetHeight(int x);
8 U4 t& M+ V' ]( b void SetWeight(int y);
/ e7 S& b$ `0 }) }6 c1 Jprivate:
: c; e4 c0 h# ]9 V7 `1 S; Y& L( h int Height;
int Weight;
};
void Human::SetHeight(int x)
4 N3 n* }8 O# |# ~/ l" q( \{
Height=x;
5 @  v4 p2 K1 q}
# Q# I6 L$ i8 Lvoid Human::GetHeight()
9 L" B& |0 o& u+ h6 n) Z% q( z{
) `; H/ D  }" A) N* Z+ ^$ f cout<<Height;
. o6 S' i4 Y; U. |4 {) ~( T}
void Human::SetWeight(int y)
1 z+ s7 O) J+ s' ~0 E+ L  q{
6 {) `6 E( H8 ? Weight=y;
! k6 w/ R" i' p' o# \* v5 N0 k! V+ e/ ]}
( j0 w1 m; }6 o6 ^8 S5 Fvoid Human::GetWeight()
{
( P' a1 Z1 Z& g6 b1 i# c cout<<Weight;
3 N$ n, K; C1 Z/ @8 L6 f}
: ~) l' ?& C2 H8 e# _void main(void)
{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
: v& V) ?$ b; x0 O: n) K9 a4 y2 O   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
' z' X5 ~( h  P3 L}
推荐第二种写法

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