JSTLÖ®c±êÇ©
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) {
 
Ïà¹ØÎĵµ£º
ÏÂÃæµÄÀý×Ó¶¼ÔÚUbuntu8.04 GCCϱàÒëµÄ½á¹û£¬ÓÐЩûÓиø½á¹û
±à³ÌÒ»¶¨Òª×Ô¼º¶¯ÊÖÊÔÒ»ÊÔ£¡
1.¶¨ÒåÓëÉùÃ÷£¬¶¨ÒåÒª·ÖÅäÄڴ棬ÉùÃ÷Ö»ÊÇÉùÃ÷Ôڱ𴦶¨ÒåÁË
int a; //¶¨Òå
extern int a; //ÉùÃ÷
char str[100]
extern char str[] //ok
char * str[]
extern char str[] //error
char ......
Ò»¡¢¸ö¾¹ý±àÒëµÄC/C++µÄ³ÌÐòÕ¼ÓõÄÄÚ´æ·Ö³ÉÒÔϼ¸¸ö²¿·Ö:
1¡¢Õ»Çø£¨stack£©£ºÓɱàÒëÆ÷×Ô¶¯·ÖÅäºÍÊÍ·Å £¬´æ·Åº¯ÊýµÄ²ÎÊýÖµ¡¢¾Ö²¿±äÁ¿µÄÖµµÈ£¬ÉõÖÁº¯ÊýµÄµ÷Óùý³Ì¶¼ÊÇÓÃÕ»À´Íê³É¡£Æä²Ù×÷·½Ê½ÀàËÆÓÚÊý¾Ý½á¹¹ÖеÄÕ»¡£
¡¡¡¡2¡¢¶ÑÇø£¨heap£© £ºÒ»°ãÓɳÌÐ ......
#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 ......
֪ʶ½á¹¹:
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
¾ß ......
#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; ......