25.类，对象，成员实例

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第一种写法：
$ c; t* V. v) E* I# i) D2 ^7 {- d#include <iostream>
using namespace std;
class Human
{
public:
void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
. N+ e( L+ ?* ~5 s& bprivate:
: X: t) Q# b8 ^9 z/ L/ g" }+ m' { int Height;
$ t  P" X1 h6 ]6 Z: T* n' x% x/ O int Weight;
+ S5 ~2 u" W$ K: Y$ @# V};
7 ^( K  a( W$ @( [
3 m' @) Q3 g8 M+ D% yvoid main(void)
{
6 z* g) \+ o' ]" F   Human Lee;
" N0 x; k/ e- P+ c3 @1 a1 v, r& `   Lee.SetHeight(172);
  u( n8 |; j5 I1 U   cout<<"Lee的身高是：";
   Lee.GetHeight();
. O5 o+ F4 ~3 J   cout<<endl;
% A* k* F% a& ^% ]5 w" X& b   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
# w5 B) d% H$ O! j2 }   Lee.GetWeight();
   cout<<endl;
' N; V. b- h& l/ k9 a}
; X8 X3 U* k/ L! V. ~第二种写法：
! s+ `' j! Q6 j#include <iostream>
using namespace std;
class Human
7 |! ^$ U0 x- Y( z6 A% A( W{
) r8 t, O! g) cpublic:
; c; P* k4 A! d5 v void GetHeight();
    void GetWeight();
" w! B) \2 T2 a" ]& F7 {2 U void SetHeight(int x);
% _: [: p1 `! T& g( C! C void SetWeight(int y);
private:
  L5 Y8 M0 a+ F: ~2 ^ int Height;
int Weight;
};
void Human::SetHeight(int x)
" e% B/ a' p" s2 B8 H' I{
Height=x;
# c$ r( L, O% F3 G1 n( c}
void Human::GetHeight()
- T# W+ `! }& J4 d* D) m{
cout<<Height;
}
$ N+ K! ^3 Q. G3 ^+ Pvoid Human::SetWeight(int y)
{
Weight=y;
$ @) |5 {& D4 e" d' Z6 z}
void Human::GetWeight()
{
6 A7 X4 R1 o1 F0 j7 O- D cout<<Weight;
}
/ g# \, c9 S$ c1 I/ ivoid main(void)
! M. @. T4 Q1 O0 K{
   Human Lee;
9 U" T" A$ b5 ~1 g9 @. O  t   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
2 u  k1 E1 _* B, b& h0 Q   Lee.GetHeight();
& Y$ m. o; B' p6 N# R   cout<<endl;
! h( {8 `" t0 l* |   Lee.SetWeight(120);
8 d6 A1 [: S" `8 c- Z4 T   cout<<"Lee的体重是：";
   Lee.GetWeight();
& {7 a# B* L( M( ]9 H( h0 s- C   cout<<endl;
# B. C' O& M  P}
# f5 [: G( Y' }8 A/ Y8 O* C1 I推荐第二种写法


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