25.类，对象，成员实例

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第一种写法：
6 @* d- F( A% F3 `- _: |& s#include <iostream>
# S$ Y* l$ E8 ?3 Busing namespace std;
8 ?% p6 j3 H, y. Rclass Human
0 e2 u- H# U( Z! }3 `5 V{
/ s! H5 P: x( O: wpublic:
1 W8 \8 [% Z; H9 R" W$ n void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
5 b4 M  w+ L0 c4 j( K. k int Height;
. l) @+ Q* \7 J! V/ [ int Weight;
};
. G  f' V. A' \& s2 n% A* A1 Y
: ?4 j6 I& J& M1 ]! j: c/ G4 `% _void main(void)
9 N3 `8 n0 O6 P' G{
; f/ k) E* C; F) i$ ]: E. a. c   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
% H5 j; w2 _3 ~- a; |  g   cout<<endl;
5 w* U5 [: N  w- f% R0 q   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
8 |! r- h+ S+ c! s+ i) E   Lee.GetWeight();
1 X9 s8 _# }7 k  y7 X" F   cout<<endl;
}
第二种写法：
#include <iostream>
) K! N0 Y& Z( kusing namespace std;
class Human
{
public:
4 ~4 }5 ^2 M. V8 v% o( g4 K. W void GetHeight();
4 w2 s3 |' i5 h# q    void GetWeight();
5 s$ F1 a0 c9 v) a void SetHeight(int x);
9 u5 I5 @2 ^2 L- S0 @  T void SetWeight(int y);
private:
int Height;
' v! N5 h, Y+ [3 r( j" y int Weight;
+ e. a0 o# Y6 o, q; g4 b, Y};
* W+ ?$ U% w( Q" w  Z! N9 ovoid Human::SetHeight(int x)
{
: x4 k7 |( Y( I$ b Height=x;
3 c' y6 v8 ^1 V/ j}
. i2 H1 q& R8 [. X, |, tvoid Human::GetHeight()
{
8 U% Z4 j" a6 }' E0 i, w4 t cout<<Height;
}
) a( c9 s; v6 D* S# H# S" `void Human::SetWeight(int y)
{
Weight=y;
6 V$ h9 }& f7 x) `8 L+ s# t- l}
: X  u; `7 r% W' ~. N# Mvoid Human::GetWeight()
, j# p. {# z" t  S{
1 r* o% c, R% |& k4 ]+ m+ w' a cout<<Weight;
}
void main(void)
{
' ]/ m# a' {8 I   Human Lee;
   Lee.SetHeight(172);
0 Q$ f. ^# G: r7 V   cout<<"Lee的身高是：";
   Lee.GetHeight();
" v% }5 V, ^( T/ E; q   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
; U4 n, O2 b1 ^0 I7 E   Lee.GetWeight();
   cout<<endl;
}
推荐第二种写法


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