There are several ways how to retrieve string input, e.g getline() , or fgets() but all of them require size of the string as an argument. But what if i want to retrieve string of unknown size? How is it possible using getline() or fgets() in C?
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`getline` is no standard C. As `fgets` **is** standard C, it would be strange if you could not use it. What is your problem? Please read [ask]. – too honest for this site Dec 06 '15 at 13:36
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as i said , both of them requires size of the string as argument , i do not know the size of the string – Abdir Dec 06 '15 at 13:38
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The answer is no. You can't read a string of indeterminate length. You can, however, read one character at a time until you reach the size of the storage space you have allocated in your program. Use fgetc in a loop.
int fgetc(FILE *stream)
Open the stream , read one character at a time, and stop reading when you see your sentinel character, which is probably a newline.
nicomp
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1You can read a string of indeterminate length. There’s just no builtin to do it. – Ry- Dec 06 '15 at 14:00
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(The reason I bring it up is that in “You can't read a string of indeterminate length. You can, however, read one character at a time until you reach the size of the storage space you have allocated in your program.”, the “other” option isn’t built-in either.) – Ry- Dec 07 '15 at 01:38
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My answer describes exactly what you are saying, but technically it's not reading a string, it's reading a series of char items and saving them contiguously. – nicomp Dec 07 '15 at 01:43