25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
1 z! n7 u) T- N7 R# P) gclass Human
7 S$ o% ]% c# L( @$ Q$ r{
# U0 f, i/ z& bpublic:
4 c" P% Y( V8 X2 L  v4 w8 V# g void GetHeight(){cout<<Height;}
: h, ]7 _( e) ?7 b; S void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
* f: \5 g0 {) w0 x* ]) Kprivate:
+ L$ L+ m  Q9 x int Height;
int Weight;
4 |- M8 K& V: i. N  h8 n};
0 \1 N2 w; ~, n& E. i3 C- l
void main(void)
$ O( V( t4 b4 K{
   Human Lee;
; S# T/ M. c4 `5 m& g& _   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
. o, u' a: A9 G$ C   Lee.GetHeight();
   cout<<endl;
. x6 _- d# G6 I8 l   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
9 c( v0 e5 k* P) e, D4 _8 V   Lee.GetWeight();
   cout<<endl;
! \+ @1 G6 M9 S* S: P2 _9 H}
第二种写法：
% G. X) _) i% j3 ^#include <iostream>
' A! N% o, D7 B; dusing namespace std;
class Human
{
public:
$ }( J9 ~1 v$ q- ?+ t. K# T void GetHeight();
/ W1 w7 ^# a* Q9 f2 j7 L( Z    void GetWeight();
void SetHeight(int x);
* r* r* E- M2 f* p* C3 B void SetWeight(int y);
2 p3 o$ C1 G8 G. b6 z& G6 xprivate:
int Height;
int Weight;
};
void Human::SetHeight(int x)
* H7 ]. |# V, @$ u: H5 ?/ n! S{
Height=x;
}
" V( ^9 @5 j( E; E9 T. ovoid Human::GetHeight()
( |$ u4 m' |. p{
* y6 n0 x" s  k" |: \) `) w cout<<Height;
$ ?# |3 ]9 I8 \}
void Human::SetWeight(int y)
{
Weight=y;
& R* A/ f1 Y& p/ X}
void Human::GetWeight()
{
. w* G/ j, R" N% M. E& s5 c2 R+ g cout<<Weight;
}
, x- m$ A- [3 T0 d7 m" w* W3 Yvoid main(void)
{
9 e. V' {9 [, g' M   Human Lee;
$ N* D  V, w: Y! y7 {   Lee.SetHeight(172);
" E7 a/ s* B: H% O8 Y, P5 M# Z. Q" J   cout<<"Lee的身高是：";
   Lee.GetHeight();
& Z  s2 m$ P# ~0 ?   cout<<endl;
: ], U9 }6 @3 r- B   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
+ b7 a# H8 B* V8 m   cout<<endl;
}
推荐第二种写法
, ?- C. ]; D' L# P8 c1 D

" x) Y2 `$ c5 k7 T" [( {