25.类，对象，成员实例

(@_@)

第一种写法：
2 i$ A* A' p+ t* Z" k5 U) a- t. {#include <iostream>
  C* a4 {$ {2 P! uusing namespace std;
class Human
) R. F' m" r6 H/ P2 P8 l4 u) u{
9 Z+ P* o7 o. ^7 bpublic:
void GetHeight(){cout<<Height;}
2 q: @/ Q0 \9 ^/ y+ q( Q void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
% T* V# E! s2 h5 Y int Height;
int Weight;
: m5 c* H- g+ d& [$ \3 C6 d3 ~};

" V# Q( \  F& K5 M" J5 \! Q: _5 Gvoid main(void)
8 ~" a3 u% Y% f. D6 |{
# l3 W" R) j+ L+ O3 o  Y   Human Lee;
1 K/ K& J1 x/ W( ^! [# e   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
# x* J/ M5 t# c$ U   cout<<endl;
! ^  r" C; U5 [% B. {   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
6 [- f" @) v8 [. `8 V   Lee.GetWeight();
$ D: y8 x, V1 Z& `5 ?; [; G   cout<<endl;
, o8 R% r% f" e6 K}
第二种写法：
#include <iostream>
, E. ]0 S2 G; W. r6 y" |using namespace std;
. V: J/ n+ v$ ?) g/ p: Z7 {/ q3 Pclass Human
{
$ N2 V+ h+ @8 S! N& {& k% lpublic:
# M9 w0 T/ ?" `' m& ~- {1 c+ A6 ] void GetHeight();
    void GetWeight();
void SetHeight(int x);
6 r2 e, V, q1 U void SetWeight(int y);
/ J; G2 R  N# t) `3 x8 @private:
int Height;
int Weight;
};
void Human::SetHeight(int x)
{
Height=x;
/ Z  {/ Y7 x% ]1 h}
void Human::GetHeight()
0 r4 ]3 O# T9 n; k{
cout<<Height;
* u1 b8 Z3 s5 x$ i5 z}
void Human::SetWeight(int y)
& O( g6 _! z" C5 A2 }$ `{
Weight=y;
- |$ d% F( }( A0 f}
void Human::GetWeight()
{
cout<<Weight;
}
# Y- w6 F7 \, z1 k! fvoid main(void)
{
   Human Lee;
2 ]" Y$ C3 H) n   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
5 s* q) S0 Y1 t+ R: N4 l6 c   Lee.GetHeight();
( A0 V" {6 N! l  t' x   cout<<endl;
( L: }- P+ S8 A" V2 {0 t5 }9 {   Lee.SetWeight(120);
0 R* u6 M: @+ `. f8 v# a  h7 B   cout<<"Lee的体重是：";
   Lee.GetWeight();
6 e+ \8 m! v0 G3 Z   cout<<endl;
8 h- R) i  z# i}
推荐第二种写法
  ]0 S. Z8 y9 u; ^8 S

7 }1 J' F( y9 f