关于抽象类:abstract class Car{ abstract function getMaximumSpeed();}class FastCar extends Car{ function getMaximumSpeed(){ return 150; }}注意事项:如果实现的类也是抽象的,....
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Web程序 时间:
2014-11-05 10:34:48
阅读次数:
240
用于文件操作主要有两个类ifstream,ofstream,fstream,例子如下1. 读操作#include using name space std;int main(){ cCar car; // initialize a car object ifstream...
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编程语言 时间:
2014-11-05 00:07:33
阅读次数:
262
select DISTINCT carnum from new_op_car_ownerdelete from new_op_car_owner where carnum in(select carnum from(select max(carnum) as carnum,count(carnum)...
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其他好文 时间:
2014-10-31 19:01:13
阅读次数:
159
delete from op_car_owners2 where carnum in(select carnum from(select max(carnum ) as carnum ,count(carnum) as count from op_car_owners2 group by carnu...
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数据库 时间:
2014-10-31 18:53:19
阅读次数:
267
select * from op_breakrule where hphm='苏A2GD78'show index from op_car_owner;alter table op_car_owner add index index_chassisid(chassisid) ;drop index ...
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数据库 时间:
2014-10-31 18:48:21
阅读次数:
202
逻辑运算符 学习目标:理解逻辑运算符和使用(&& ||)。' ;$house=true;$car=true;if($house===true&&$car===true){ //分析: 用‘&&’逻辑符判断 ‘并且’ 要满足二个条件才为真。 echo 'I love you','';} else...
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其他好文 时间:
2014-10-30 19:05:04
阅读次数:
171
There areNgas stations along a circular route, where the amount of gas at stationiisgas[i].You have a car with an unlimited gas tank and it costscost[...
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编程语言 时间:
2014-10-27 00:17:09
阅读次数:
283
问题描述:
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.
For example,
"A man, a plan, a canal: Panama" is a palindrome.
"race a car" is...
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其他好文 时间:
2014-10-25 21:30:51
阅读次数:
191
Main.m
#import
#import "Car.h"
#import "Engine.h"
#import "Lamp.h"
/*
设计如下几个类,Car自定义初始化方法,初始化方法传入引擎对象和车灯对象。
当车启动的时候,会调用引擎转动,车灯亮灯,当车停止的时候调用引擎停止转动,车灯熄灭。
*/
int main(int argc, const char * argv...
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其他好文 时间:
2014-10-23 16:27:14
阅读次数:
217
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.
For example,
"A man, a plan, a canal: Panama" is a palindrome.
"race a car" is not a...
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其他好文 时间:
2014-10-21 23:16:15
阅读次数:
293