25.类，对象，成员实例

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第一种写法：
/ q, v. z4 c& \3 V) O#include <iostream>
& @0 @7 ~% k9 Q  _, Tusing namespace std;
- m8 x* m  k. R  ?6 M1 @class Human
{
public:
' R1 i' W# Z6 i. J void GetHeight(){cout<<Height;}
void GetWeight(){cout<<Weight;}
void SetHeight(int x){Height=x;}
void SetWeight(int y){Weight=y;}
private:
: E9 b" c7 ?* r9 a& R) _: ^# N int Height;
int Weight;
8 P( Z2 x" b1 J- \};
4 k6 D* a) P' Q; P
% i  p  G1 |2 z# v9 R7 _8 r; Jvoid main(void)
% U6 m) t) {; T4 n{
   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
- Y% L1 C5 P$ ^* r3 _& |4 s! L. T3 e4 J   Lee.GetWeight();
% e8 W, b+ S% x( P( T; c$ P5 E   cout<<endl;
  D4 I! c$ f: T& v( y# v6 }}
第二种写法：
#include <iostream>
5 N  Q* B) o/ y0 _using namespace std;
5 m, B. K8 |# _3 ~# R: ?% \  w2 ]class Human
: x3 b: f4 B7 X1 Y3 d; H3 S{
public:
) w. Y- k* w! ` void GetHeight();
    void GetWeight();
void SetHeight(int x);
3 a7 Q1 B" n4 E8 \$ n void SetWeight(int y);
' ]2 U# k" \' aprivate:
int Height;
int Weight;
# Q& O2 D# N$ k. e* k' @};
void Human::SetHeight(int x)
{
Height=x;
}
void Human::GetHeight()
{
2 ?4 v- B9 P2 |1 N cout<<Height;
}
void Human::SetWeight(int y)
{
6 o- X+ b& g9 u( K Weight=y;
}
void Human::GetWeight()
{
8 [4 @3 P6 H6 t0 @( g8 P+ j' I, ? cout<<Weight;
% m  r5 Q4 q% s( a/ Z}
9 ^0 ?. g# h3 J: r+ x% s; lvoid main(void)
{
   Human Lee;
  v, Q$ k5 E7 _# O( P   Lee.SetHeight(172);
& V5 l# b/ j; w$ c1 U; c- |   cout<<"Lee的身高是：";
  ^* p% m. J6 t+ Q' N   Lee.GetHeight();
   cout<<endl;
   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
8 _! }5 @3 J- o5 k  F5 z% w}
  v2 t8 m' ]' P$ p  u推荐第二种写法
; W- A% y  U9 c) n" s  K$ w8 y
9 ~+ J0 r) y0 y& v% H5 `8 l
" n# \4 F, e- y