the ansi c programming phần 2 pdf

... as 'x' . The value of a character constant is the numeric value of the character in the machine's characterset.Forexample,in the ASCIIcharacterset the characterconstant '0' has the value 48, ... etc., formacontiguousincreasingsequence. Another example of char to int conversion is the function lower , which maps a single character to lower case...

Ngày tải lên: 06/08/2014, 09:20

... recursive version of the function reverse(s) , which reverses the string s inplace. 4.11 The C Preprocessor C provides certain language facilities by means of a preprocessor, which is conceptionally ... replaced by their sum, 9. The product of -1 and 9, which is -9, replaces them on the stack. The value on the topof the stackispoppedandprintedwhen the endof the inputli...

Ngày tải lên: 06/08/2014, 09:20

... isn't there and if none of the cases match, no action at all takes place.Casesand the defaultclausecanoccurinanyorder. In Chapter1 we wrote a program to count the occurrences of each digit, ... files called main .c , getline .c ,and strindex .c .Then the command ccmain .c getline .c strindex .c compiles the three files, placing the resulting object code in...

Ngày tải lên: 06/08/2014, 09:20

... library. The first function is strcpy(s,t) , which copies the string t to the string s . It would be nice just to say s=t but this copies the pointer, not the characters.Tocopy the characters,weneedaloop. The arrayversionfirst: /*strcpy:copyttos;arraysubscriptversion*/ 91 intgetline(char*,int); char*alloc(int); /*readlines:readinputlines*/ ...

Ngày tải lên: 06/08/2014, 09:20

... the format .Itreturns the numberofcharactersprinted. The format string contains two types of objects: ordinary characters, which are copied to the outputstream,andconversionspecifications,eachofwhichcausesconversionandprintingof the ... the getch and ungetch that we wrote in Chapter4. When the collection of an alphanumeric token stops, getword has gone one chara...

Ngày tải lên: 06/08/2014, 09:20

... input functionslike scanf , getc ,or getchar . 7.8.4CommandExecution The function system(char *s) executes the command contained in the character string s , then resumes execution of the current program. The contents of s depend strongly on the localoperatingsystem.Asatrivialexample,onUNIXsystems, the statement system("date"); causes ... file orerro...

Ngày tải lên: 06/08/2014, 09:20

... which specifies the character NUL. The escape \xhh consists of the backslash, followed by x , followed by hexadecimal digits, which are taken to specify the value of the desired character. There ... described in a 155 The escape \ooo consists of the backslash followed by 1, 2, or 3 octal digits, which are taken to specify the value of the desired character. A common example...

Ngày tải lên: 06/08/2014, 09:20

... the location in the abstract-declarator where the identifier would appear if the construction were a declarator in a declaration. The named type is then the sameas the typeof the hypotheticalidentifier.Forexample, int int* int*[3] int(*)[] int*() int(*[])(void) name ... by collecting the necessary programs and data, and connecting external functions a...

Ngày tải lên: 06/08/2014, 09:20

... the conditiondescribed,andzeroifnot. isalnum (c) isalpha (c) or isdigit (c) istrue isalpha (c) isupper (c) or islower (c) istrue iscntrl (c) controlcharacter isdigit (c) decimaldigit isgraph (c) printingcharacterexceptspace islower (c) lower-caseletter isprint (c) printingcharacterincludingspace ispunct (c) printingcharacterexceptspaceorletterordigi...

Ngày tải lên: 06/08/2014, 09:20