25.类，对象，成员实例

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第一种写法：
1 H; y3 j0 {8 V5 {) q  P3 |5 l#include <iostream>
using namespace std;
class Human
{
* Z6 ^2 ^# e0 s5 y4 F8 }; M- L. M7 [public:
; ]; }% g3 n, P) t4 Q. j void GetHeight(){cout<<Height;}
0 j: _6 L- i2 z1 o  D/ S6 n( ^1 o void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
int Height;
int Weight;
};
8 r, r  b8 J8 C# m* }
# j0 x; \0 h$ T' E* Ovoid main(void)
{
3 }9 w* Z' U% S- v+ V" k; R   Human Lee;
   Lee.SetHeight(172);
' I" m5 K* V8 V& e% @2 c9 n7 m   cout<<"Lee的身高是：";
   Lee.GetHeight();
* N( P4 L3 v* @( B8 L- h0 ~1 x   cout<<endl;
   Lee.SetWeight(120);
: E2 b6 u- t* x8 ^  v# W, D   cout<<"Lee的体重是：";
   Lee.GetWeight();
. C0 X/ D- I$ a6 ]# M   cout<<endl;
8 b& t( h# g, G# ~" a}
& v8 U# N0 B2 t9 e- j第二种写法：
' T6 t/ D+ o5 _/ h' z#include <iostream>
using namespace std;
class Human
; I) o: Y$ x6 ~% W$ k7 F{
8 V5 R8 d8 d& s! [& V0 v8 A9 }: ipublic:
: Z7 m; V. o6 b0 H  j0 S" E void GetHeight();
    void GetWeight();
void SetHeight(int x);
. ?* p2 G! X% _& D void SetWeight(int y);
private:
int Height;
int Weight;
};
( g9 `( Z* s9 T' I9 ]) z% }- Bvoid Human::SetHeight(int x)
; F1 m, t, `6 g8 b+ q{
5 y: r, a4 U: l% t/ b% ] Height=x;
) @- e9 T- X# U  J3 \7 Q3 s}
void Human::GetHeight()
9 y' @3 L7 Y5 F3 A. P! n2 d{
' V  o# k% g8 }' z$ [ cout<<Height;
}
2 Y* W" o$ h' `6 @) G8 ]void Human::SetWeight(int y)
{
+ u  `( w2 K+ Q/ y4 _' v Weight=y;
}
void Human::GetWeight()
{
- m3 }& b) n/ V6 A6 `3 a cout<<Weight;
+ }6 k3 A9 |2 B0 T' V}
void main(void)
6 A3 n* Y) M4 k- m6 z{
  T% W; m  h6 r0 |# c1 z+ B0 e   Human Lee;
) \$ E0 j8 G! h  \' a8 i! c   Lee.SetHeight(172);
" J1 R3 m- r6 f0 V+ M   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
3 O/ r2 `( e7 C2 Y% L" J2 g' O   cout<<"Lee的体重是：";
   Lee.GetWeight();
/ M( D9 S1 a  O- ]   cout<<endl;
9 f' T$ U1 c3 R' c; p: x/ w}
推荐第二种写法
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