Ray's playground

摘要： Usingnames.txt(right click and 'Save Link/Target As...'), a 46K text file containing over five-thousand first names, begin by sorting it into alphabetical order. Then working out the alphabetical value for each name, multiply this value by its alphabetical position in the list to obtain a na 阅读全文

摘要： 1#import"PeopleView.h"2#import"Person.h"34@implementationPeopleView56-(id)initWithPeople:(NSArray*)persons7{8[superinitWithFrame:NSMakeRect(0,0,700,700)];9people=[personscopy];10attributes=[[NSMutableDictionaryalloc]init];11NSFont*font=[NSFontfontWithName:@"Monaco"size: 阅读全文

摘要： 1#import<Foundation/Foundation.h>23intmain(intargc,constchar*argv[])4{56NSAutoreleasePool*pool=[[NSAutoreleasePoolalloc]init];78NSString*test=@"Shanghai;40.00;RayZhang;";9NSScanner*scanner=[NSScannerscannerWithString:test];1011NSString*location;12floatnumber;1314NSCharacterSet*charac 阅读全文

摘要： 1#include<iostream>2usingnamespacestd;34classnoncopyable5{6protected:7noncopyable(){}8~noncopyable(){}9private:10noncopyable(constnoncopyable&);11constnoncopyable&operator=(constnoncopyable&);12};1314classmyclass:privatenoncopyable15{16public:17myclass()18{19cout<<"mycla 阅读全文

摘要： You are given the following information, but you may prefer to do some research for yourself.1 Jan 1900 was a Monday.Thirty days has September,April, June and November.All the rest have thirty-one,Saving February alone,Which has twenty-eight, rain or shine.And on leap years, twenty-nine.A leap year 阅读全文

摘要： Metaphors are heuristics, not algorithms. As such, they tend to be a little sloppy. Metaphors help you understand the software-development process by relating it to other activities you already know about. Some metaphors are better than others. Treating software construction as similar to building . 阅读全文

摘要： Let d(n) be defined as the sum of proper divisors ofn(numbers less thannwhich divide evenly inton).If d(a) =band d(b) =a, whereab, thenaandbare an amicable pair and each ofaandbare called amicable numbers.For example, the proper divisors of 220 are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110; therefo 阅读全文

摘要： Developing computer software can be a complicated process, and in the last 25 years, researchers have identified numerous distinct activities that go into software development. They include Problem definition Requirements development Construction planning Software architecture, or high-level design 阅读全文

摘要： Starting in the top left corner of a 22 grid, there are 6 routes (without backtracking) to the bottom right corner.How many routes are there through a 2020 grid?1#include<iostream>2usingnamespacestd;34#definenum415longlongPascalTriangle[num][num];67voidCalcPascalTriangle()8{9PascalTriangle[0][ 阅读全文

摘要： 1#import"Singleton.h"234@implementationSingleton5staticSingleton*instance;67-(id)init8{9self=[superinit];10if(self){11//Initializationcodehere.12}1314returnself;15}1617+(id)alloc18{19@synchronized([Singletonclass])20{21instance=[superalloc];22returninstance;23}24returnnil;25}2627+(Singleto 阅读全文