Standard Input/Output Library - University of Windsor

More documents

Recommendations

Info

$C:\Users\rschurko\Documents\My Documents\Courses\Lab_Design ...$

IntroductionStreams and FILE objectsBufferingOpening a StreamReading and writing a streamNote that these 3 functions return -1 whether an error or theend-of-file occurs.How to differentiate between the 2 situations?For each stream, two flags are maintained in the FILE object:an error flag and an end-of-file flag.The following three functions should be used to access theseflags:int ferror(FILE*)returns nonzero for true, 0 otherwiseint feof(FILE*)returns nonzero for true, 0 otherwisevoid clearerr(FILE*)clears both the error and the end-of-file flags.Standard Input/Output Library60-256 System Programming
IntroductionStreams and FILE objectsBufferingOpening a StreamReading and writing a streamPushing back a characterint ungetc(int c, FILE *fp)The function int ungetc(int c, FILE *fp)Return c if OK, -1 otherwise.This function is used to push back a character after readingfrom a stream.This is useful when we need to peek at the next character todetermine what to do next.Note that:The pushed-back character does not have to be the sameas the one that was read.We cannot push back EOFWe can push back a character after end-of-file is reached.Then, we can read that character because ungetc() clearsthe end-of-file flag of the stream.Standard Input/Output Library60-256 System Programming
Page 1 and 2: Content60-256 System Programming:St
Page 3 and 4: IntroductionStreams and FILE object
Page 5 and 6: BufferingIntroductionStreams and FI
Page 8 and 9: Unbuffered I/OIntroductionStreams a
Page 12 and 13: Example 2IntroductionStreams and FI
Page 15 and 16: Opening a StreamIntroductionStreams
Page 17 and 18: Argument typesIntroductionStreams a
Page 19 and 20: Unformatted I/OIntroductionStreams
Page 21: Example...IntroductionStreams and F
Page 28 and 29: ExampleIntroductionStreams and FILE
Page 30: IntroductionStreams and FILE object

Standard Input/Output Library - University of Windsor

Create successful ePaper yourself

Delete template?

Save as template?