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Student.java£º
package com.myapp.beans;
 
public class Student {
 
       private String sno;
 
       private String sname;
 
       private Integer sage;
 
       private String ssex;
 
       private String deptno;
 
       public Student(String sno, String sname, Integer sage, String ssex,
                     String deptno) {
              this.sno = sno;
              this.sname = sname;
              this.sage = sage;
              this.ssex = ssex;
              this.deptno = deptno;
       }
 
       public String getDeptno() {
              return deptno;
       }
 
       public void setDeptno(String deptno) {
              this.deptno = deptno;
       }
 
       public Integer getSage() {
              return sage;
       }
 
       public void setSage(Integer sage) {
             


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C traps and Puzzles

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int a;     //¶¨Òå
extern int a;  //ÉùÃ÷
char str[100]
extern char str[]  //ok
char * str[]
extern char str[] //error
char ......

c/c++ÄÚ´æ»®·Ö

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      1¡¢Õ»Çø£¨stack£©£ºÓɱàÒëÆ÷×Ô¶¯·ÖÅäºÍÊÍ·Å £¬´æ·Åº¯ÊýµÄ²ÎÊýÖµ¡¢¾Ö²¿±äÁ¿µÄÖµµÈ£¬ÉõÖÁº¯ÊýµÄµ÷Óùý³Ì¶¼ÊÇÓÃÕ»À´Íê³É¡£Æä²Ù×÷·½Ê½ÀàËÆÓÚÊý¾Ý½á¹¹ÖеÄÕ»¡£ 
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#include <iostream.h>
void fun0(int* p)
{
int* a=new int[3];
*a=0;
*(a+1)=1;
*(a+2)=2;
p=a;
}
void fun1(int* &p)
{
int* a=new int[3];
*a=0;
*(a+1)=1;
*(a+2)=2;
p=a;
}
void fun2(int* p)
{
*p=0;
*(p+1)=1;
*(p+2)=2;
}
//warning:returning address of local va ......

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1¡¢if,for,switch,goto
2¡¢#define,const
3¡¢Îļþ¿½±´µÄ´úÂë,¶¯Ì¬Éú³ÉÄÚ´æ,¸´ºÏ±í´ïʽ,strcpy,memcpy,sizeof
4¡¢º¯Êý²ÎÊý´«µÝ,ÄÚ´æ·ÖÅ䷽ʽ,ÄÚ´æ´íÎó±íÏÖ,mallocÓënewÇø±ð
5¡¢ÀàÖØÔØ¡¢Òþ²ØÓ븲¸ÇÇø±ð,externÎÊÌâ,º¯Êý²ÎÊýµÄȱʡֵÎÊÌâ,ºê´úÂëÓëÄÚÁªº¯ÊýÇø±ð
6¡¢¹¹ÔìºÍÎö¹¹µÄ´ÎÐò,Stringº¯Êý¶¨Òå
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C ÓïÑÔÊý¾Ý¶ÔÆë

#include <stdio.h>    
struct Foo1
{
   char a;
   int  b;
   char c;
   int  d;
};
#pragma pack (2)
struct Foo2
{
   char a;
   int  b;
   char c;
   int  d; ......
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