25.类，对象，成员实例

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第一种写法：
#include <iostream>
using namespace std;
8 C0 y/ Z* V- y; ~9 K/ Qclass Human
{
/ |& V+ f+ D; Gpublic:
void GetHeight(){cout<<Height;}
9 H) R! r4 y. y5 Z/ Y void GetWeight(){cout<<Weight;}
- n. I+ {# E' z( Q8 \3 }+ S. U& \ void SetHeight(int x){Height=x;}
. X  M* ^# |2 M0 I/ j void SetWeight(int y){Weight=y;}
8 ]8 g+ i/ J$ j8 w, F& ]private:
0 D9 `; d9 C( O4 V int Height;
) c8 m" j5 y6 ^/ H9 Y/ g int Weight;
};

void main(void)
+ W* o' M& r" K# h# g{
   Human Lee;
7 `# L. E/ k* X   Lee.SetHeight(172);
( }) X) Y' V  K   cout<<"Lee的身高是：";
+ D# W% E. A- p% X6 L   Lee.GetHeight();
   cout<<endl;
5 i& C0 y" F% b: j" ?   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
3 F% S$ d& p$ i# y. p% v' i   Lee.GetWeight();
( _5 L. j5 u1 b4 O3 L6 j   cout<<endl;
$ o+ Q% O$ ?& @}
第二种写法：
4 D& z; L/ o. _6 E) Z  |#include <iostream>
" R" \. p& @, D8 b( f6 A: j' lusing namespace std;
( m6 P0 E  w0 S+ Lclass Human
{
8 z' s! u3 ~8 O. h) {  G4 ]public:
+ K2 L8 i; L9 `7 D  { void GetHeight();
    void GetWeight();
void SetHeight(int x);
; L3 J0 k4 }! e/ f7 K/ u void SetWeight(int y);
private:
int Height;
int Weight;
};
void Human::SetHeight(int x)
{
Height=x;
}
void Human::GetHeight()
4 X$ `" m+ [2 l" F! v% C5 Z{
% [& b$ g' F2 _8 l4 R. c* ? cout<<Height;
}
void Human::SetWeight(int y)
{
Weight=y;
}
# q, n, e7 }% `) p; evoid Human::GetWeight()
{
cout<<Weight;
}
void main(void)
" k' }9 `, H+ q7 S* j. z1 A{
7 j* A: c& F* i1 Z. p* |   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
( R# P/ H* F5 q8 \/ N* j5 c+ e   Lee.GetHeight();
   cout<<endl;
$ O3 h7 G8 m1 X: S   Lee.SetWeight(120);
6 v* L" c6 A& B- P   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
}
1 s# m) I6 s+ P- x8 g7 Z推荐第二种写法
+ H, w( K( s7 h# h7 K

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