25.类，对象，成员实例

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第一种写法：
#include <iostream>
  ~- m' P$ m) ^using namespace std;
class Human
1 C# L3 {" p6 b- O+ d) ]* H{
" U# q) l# N' |: Spublic:
5 J% n, O4 R  L) s void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
" p; b9 }: }' u( T) w& M" [! m& c void SetWeight(int y){Weight=y;}
$ {3 }' Q0 P1 ~& [5 M7 D! tprivate:
int Height;
( r1 s: I2 d; B1 l) j: ]7 S int Weight;
};
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void main(void)
{
   Human Lee;
) L6 G/ G% S% y/ A3 q9 b( U   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
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' M1 b1 ?8 g: |* h+ H$ r$ @6 d第二种写法：
#include <iostream>
# P) k( D) b/ q. U, U) f0 Fusing namespace std;
7 l' i1 ^! v6 L% b$ cclass Human
3 y6 S+ |& l5 U, ^& P{
public:
% W* \2 u4 v- e* a: ]; E1 H void GetHeight();
5 \; k$ x+ p$ d    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
private:
) _, u! J8 d, K9 ]5 Z+ R7 h int Height;
int Weight;
};
5 b, k# L+ B! J' v- J4 Z: Dvoid Human::SetHeight(int x)
{
4 D) {( L/ V+ }, Z Height=x;
}
' W# E' ~5 ?8 _( t+ @0 U- _void Human::GetHeight()
{
cout<<Height;
* ?) K+ u3 I8 I5 q; j% k}
' H* j0 G3 e- D2 B6 V3 F5 Rvoid Human::SetWeight(int y)
{
Weight=y;
}
8 r  _0 W5 S1 s! F( V  z* x5 nvoid Human::GetWeight()
1 Y9 W, r: V1 k{
3 p% I" S' D- @" s2 b) }- O6 x cout<<Weight;
' e) [0 E# u5 f; j0 X}
void main(void)
; n$ u; k  q- L3 K{
5 m1 q5 ?$ r$ N   Human Lee;
   Lee.SetHeight(172);
  J4 z( P+ p9 Y. N0 R  Y7 E9 v   cout<<"Lee的身高是：";
! S2 @# I% F% W   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
. @; e6 O' x& y' c2 `( ~   cout<<"Lee的体重是：";
   Lee.GetWeight();
/ |3 A& i- s) j8 A   cout<<endl;
9 v' y; o. I, K7 S" g9 J" L1 k/ ~6 A8 J}
$ Y: B4 j2 w; ~" f( ]推荐第二种写法
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