25.类，对象，成员实例

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第一种写法：
#include <iostream>
1 ?, o' l! l0 Y6 yusing namespace std;
class Human
8 Y6 ], z) f2 o! [& k{
9 J2 W" D  |0 {public:
void GetHeight(){cout<<Height;}
5 c9 s) m) B# \7 a# n( j5 v void GetWeight(){cout<<Weight;}
8 w' z, a/ K3 R' D% @  X void SetHeight(int x){Height=x;}
4 f, K- K6 n* @4 Q6 B7 B void SetWeight(int y){Weight=y;}
private:
9 m4 P; _: [0 _* X+ \ int Height;
0 O& v" \  f, j: b; H/ T" `7 c int Weight;
; ~# l7 @3 A# U" @) A5 `7 B7 g};
9 J3 [1 k9 d2 F
( `" z0 r0 `2 l2 ^void main(void)
0 j' \3 ~6 o& @+ [& b' [( Q5 I- V( Q9 E{
0 X9 A/ j: U' E- G4 {3 C   Human Lee;
   Lee.SetHeight(172);
2 `; Z9 p9 n3 B   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
6 B0 d; ]+ P! b3 ?   cout<<"Lee的体重是：";
9 k$ T5 ^6 g1 I( J" y, q7 |   Lee.GetWeight();
" U/ I0 y! D5 z$ D- @$ ]) S+ L& b   cout<<endl;
( d" n5 D: ]( u1 v2 i}
3 }$ ^" c$ r: D: s7 T第二种写法：
4 [& T: b1 A" O/ G#include <iostream>
! r, T1 x8 j3 t8 b: i/ yusing namespace std;
2 E; }/ o- Z. }* ]' b* U1 ~& U# ^class Human
& Q' {) h, @/ I' w/ A{
7 M  v; [' J( k! I0 Z) mpublic:
void GetHeight();
8 ?$ ]0 r8 n  ]; s0 F    void GetWeight();
void SetHeight(int x);
void SetWeight(int y);
private:
int Height;
7 n0 T) x3 `* ^$ i. F int Weight;
! k$ F: h6 ?" l0 S};
void Human::SetHeight(int x)
, v! u9 F# L9 r) R7 S6 q{
Height=x;
8 \) G) n% l& T' W1 N}
void Human::GetHeight()
1 r  U, i6 j: ?- K6 u* }1 j5 s{
cout<<Height;
}
& N- i- ^! P2 F% U' evoid Human::SetWeight(int y)
{
Weight=y;
3 X2 h8 H3 T" l7 a}
void Human::GetWeight()
* p/ D; }+ c8 {9 E{
+ ^  R+ i6 ^* L( y: N cout<<Weight;
5 z0 b$ b  v; T% f4 S' }, x}
, A+ c8 s2 W) yvoid main(void)
2 E  V* Y& ^4 m! ?2 \{
   Human Lee;
   Lee.SetHeight(172);
) h9 m7 _% U  u; L1 a0 J   cout<<"Lee的身高是：";
" o: W) {3 ~& B& K# u   Lee.GetHeight();
   cout<<endl;
* x4 h3 `3 t( d3 k8 o( g+ C* Y   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
1 T7 b2 e0 R+ ~# l, z4 E   cout<<endl;
2 i4 S( o5 Y- f4 O$ W7 \$ w* ~}
推荐第二种写法

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