25.类，对象，成员实例

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第一种写法：
#include <iostream>
; s8 g3 w+ o2 W3 T2 b& {using namespace std;
. z9 d$ R' M* ~, Kclass Human
  k8 d0 h) g& P% @# `' E" \{
* H' R7 G' ?6 p& h* }public:
+ v! ]# v0 T6 @; B9 |" {, ? void GetHeight(){cout<<Height;}
& `2 v- d/ L3 x5 Y+ [ void GetWeight(){cout<<Weight;}
! B6 g) K3 D! Q void SetHeight(int x){Height=x;}
. ~! W8 r& R: x void SetWeight(int y){Weight=y;}
3 x- s: S& F* F% Y+ n' |) n# iprivate:
3 J( ?# Z/ X9 _6 ^" T int Height;
int Weight;
3 t6 ~5 K6 S/ `. c: @, x7 w};
) I5 w9 Z% w3 Y' u' u
  d& F! {: H2 o/ j( A, R+ Hvoid main(void)
. }! e! d0 `* j* q$ W; _5 y{
- M- o3 R5 i! w2 \! D   Human Lee;
. V, i, H2 i' z# a4 _8 b6 a' K1 ~& G   Lee.SetHeight(172);
# h$ ~; l3 l, `* _   cout<<"Lee的身高是：";
- P2 g2 e9 ^$ L* |) \   Lee.GetHeight();
   cout<<endl;
# [4 L0 A9 M: J: ], C4 ?6 H" m   Lee.SetWeight(120);
   cout<<"Lee的体重是：";
+ F# R- y! r- _$ K5 y   Lee.GetWeight();
; V1 B$ |6 j( w- T) k" i   cout<<endl;
' S9 E! d& z" ^, t* y* |}
5 t  P9 M; c( R; D# K0 B# ?第二种写法：
#include <iostream>
9 `" P# }: k" j: n& ^: ]7 r; yusing namespace std;
, M9 S' Z" M5 _+ b% qclass Human
7 o1 h2 `* _; P, A2 b{
public:
void GetHeight();
4 q/ g+ Q4 I' o/ V- Y. P    void GetWeight();
void SetHeight(int x);
) P( R; O+ |& e% H void SetWeight(int y);
8 V- e3 |6 n( B. M# W6 o$ c+ pprivate:
int Height;
3 j2 K) \( ?' T8 Z2 j) L0 r5 R int Weight;
) W( @) ]4 `0 J: p5 ^};
void Human::SetHeight(int x)
{
* H: X5 O1 A+ }& b Height=x;
}
% L0 W( g- U- C, s" U) Qvoid Human::GetHeight()
{
# E$ O  g7 V* J/ a* T# a" M' h cout<<Height;
: q; Z, Z) ]* w}
void Human::SetWeight(int y)
{
4 V* q$ x% t( B1 g9 b Weight=y;
}
* J2 P7 A# v6 e7 c4 f) q& dvoid Human::GetWeight()
# @5 ]6 P  {4 M) G) [{
6 P8 c( P- L0 u8 Z cout<<Weight;
" ?9 e2 k6 M% `  O' L8 Y}
void main(void)
. b3 l4 A4 T6 ]5 [- i{
* H+ |: ~: w* d   Human Lee;
   Lee.SetHeight(172);
   cout<<"Lee的身高是：";
; `( }% P1 U% O8 U; X; j& B   Lee.GetHeight();
   cout<<endl;
9 J) t$ f2 i5 n+ S* l0 h   Lee.SetWeight(120);
4 M2 }  `) v& p9 k8 O9 z4 m   cout<<"Lee的体重是：";
   Lee.GetWeight();
   cout<<endl;
" H" q( |, K9 z6 M( V4 x3 F}
& M4 k( }$ D( v$ A: Q推荐第二种写法

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