scanf

Whitespace before %c specification in the format specifier of scanf function in C

by

If you read the specification for scanf() carefully, most format specifiers skip leading white space. In Standard C, there are three that do not: %n — how many characters have been processed up to this point %[…] — scan sets %c — read a character. (POSIX adds a fourth, %C, which is equivalent to %lc.) … Read more

Using scanf and fgets in the same program?

by

The first problem is that the scanf() reads two characters, but not the newline afterwards. That means your fgets() reads the newline and finishes. You are lucky your program is not crashing. You tell fgets() that it is getting an array of 35 characters, but rather than passing an array, you pass the character (not … Read more

Dynamic String Input – using scanf(“%as”)

by

The a modifier to scanf won’t work if you are compiling with the -std=c99 flag; make sure you aren’t using that. If you have at least version 2.7 of glibc, you can and should use the m modifier in place of a. Also, it is your responsibility to free the buffer.

How to validate input using scanf

by

Using scanf() is usually a bad idea for user input since failure leaves the FILE pointer at an unknown position. That’s because scanf stands for “scan formatted” and there is little more unformatted than user input. I would suggest using fgets() to get a line in, followed by sscanf() on the string to actually check … Read more

techhipbettruvabetnorabahisbahis forumu