25.类，对象，成员实例

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第一种写法：
#include <iostream>
# U2 m; @) k0 S3 p; `using namespace std;
class Human
{
1 E- X+ c' o' l) h% W& Lpublic:
% I6 `6 s, T" j( D2 X; X& }8 m void GetHeight(){cout<<Height;}
1 V( f, d+ c, z% i$ y0 c void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
" Q) |+ A, W6 G# [% ]private:
) {& j1 Y2 @4 ?4 b& Z: l int Height;
int Weight;
};

7 ]5 ^5 c/ w7 z3 a2 `void main(void)
{
) p. u6 g" Y: I/ N   Human Lee;
5 N) k0 M( c  k; Z0 O/ Z2 X   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
5 ~/ [# h& U+ p! Z* M) U8 p   cout<<endl;
   Lee.SetWeight(120);
- C% l: h. F/ K0 g   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
}
$ r0 U; Z% N3 w9 h4 w+ _$ }* G% B第二种写法：
#include <iostream>
, d$ K  E- ]/ b5 \/ C1 m7 }; `using namespace std;
class Human
) \; ~3 y) [' \+ D6 n2 D{
public:
- T1 i0 k0 y* F: M! ?* o2 C void GetHeight();
. s8 Z; D+ A# E, b    void GetWeight();
& s& |% E% f6 {, y5 B' A void SetHeight(int x);
+ [* G4 K5 B: ]2 [  J( U2 l% U# r void SetWeight(int y);
4 _5 h1 P& R; ^3 }1 Xprivate:
int Height;
+ m* Q0 n6 B; m1 T+ G# v: k6 g int Weight;
};
- Y; ^: @1 H1 P% H. Wvoid Human::SetHeight(int x)
{
# y% _# e) S7 H Height=x;
}
void Human::GetHeight()
{
$ q* e; |5 v" A. ~! P cout<<Height;
}
& C) f3 R, L5 R* F3 J% m) {: h& q4 Avoid Human::SetWeight(int y)
4 p$ i2 `! T: @, W' y! X- O{
Weight=y;
}
! B. B( l9 T* }% ]& j5 ^void Human::GetWeight()
{
4 f+ Z- }7 p9 X/ x( {" _. ^6 Y+ G. E) s cout<<Weight;
1 s- X: u" i+ ^: G4 S5 \8 @}
void main(void)
  N4 m6 O/ [0 Z/ Z/ n; O" `{
   Human Lee;
   Lee.SetHeight(172);
; s- S- V3 N( D   cout<<"Lee的身高是：";
   Lee.GetHeight();
& L1 `" Q6 o/ N; q7 U   cout<<endl;
5 x. O* F6 ?1 T1 Z! K& i   Lee.SetWeight(120);
2 Z( ~3 D/ i9 l3 F* q* N   cout<<"Lee的体重是：";
" i7 q7 x& e, `. Y4 J4 v   Lee.GetWeight();
   cout<<endl;
) q3 ?% |' Z- r$ v  p. {; {! v2 |}
推荐第二种写法
$ e, ^, j3 I0 C4 }1 m& j