25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
class Human
" T4 R7 O/ v' U/ k- G{
public:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
int Height;
int Weight;
};

void main(void)
{
   Human Lee;
   Lee.SetHeight(172);
1 `, Q8 R2 m) R1 u5 V   cout<<"Lee的身高是：";
   Lee.GetHeight();
5 ^( y) G6 w3 z8 D   cout<<endl;
4 k4 R2 @0 A; @   Lee.SetWeight(120);
1 ^5 P9 a) D  Z   cout<<"Lee的体重是：";
   Lee.GetWeight();
! a  N2 u9 `" X   cout<<endl;
}
第二种写法：
. ]6 O  ]% {& \& b5 a- ]#include <iostream>
using namespace std;
class Human
) K9 R1 F, k# x# |7 s! ~{
public:
void GetHeight();
. X5 J2 k5 d" A" Y    void GetWeight();
* O3 x' j2 H+ ]/ P void SetHeight(int x);
void SetWeight(int y);
, X, d3 w( s% r) i- W( E7 Gprivate:
, n1 F6 O( u8 l/ }( F% m% P$ }/ n9 X int Height;
2 J* D5 o9 V. o7 \ int Weight;
, P2 t: j0 I! u" L8 `$ e$ }};
, a2 `) w) D" u9 m) z3 q6 X' Lvoid Human::SetHeight(int x)
{
. h) E+ A- ^, d4 l Height=x;
2 Z% t5 g' J0 t/ ^9 Q}
9 I; N9 l4 M% n- lvoid Human::GetHeight()
{
cout<<Height;
1 Q. p% g' v6 g}
) ]8 \7 l5 n" V7 o# z& kvoid Human::SetWeight(int y)
  W" T0 L7 `) F  r{
9 d7 q- [* A- ~ Weight=y;
. p& t- k* `, j}
void Human::GetWeight()
{
* x7 a& P. W; `! g cout<<Weight;
}
2 Q3 Y! h5 Q; c+ Wvoid main(void)
{
   Human Lee;
! `. A) M! |1 c# S/ p! a1 E   Lee.SetHeight(172);
# Z. w% C9 ~) S/ E6 \* B! A   cout<<"Lee的身高是：";
. l4 S" r' k: g   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
8 \* G' R  R  V+ ]   cout<<"Lee的体重是：";
/ |( g8 W; i" W7 ]# W- e' s5 R- a   Lee.GetWeight();
   cout<<endl;
2 V4 I" ~0 i/ ?5 O}
推荐第二种写法
& G3 \2 D4 k& E" f/ M( q