2013年8月28日 · The difference between getc and fgetc is that getc can be implemented as a macro, whereas fgetc cannot be implemented as a macro. This means three things: The argument to getc should not be an expression with side effects. Since fgetc is guaranteed to be a function, we can take its address.

2011年1月21日 · getc is defined in terms of fgetc. The getc() function shall be equivalent to fgetc() , except that if it is implemented as a macro it may evaluate stream more than once, so the argument should never be an expression with side effects. The documentation for fgetc says:

2015年5月1日 · Yes your can use getc in both cases, yes you should check for EOF in both cases, except for interactiv input. In case of binary files you also need to use feof function to check for EOF. See code above to read from multiple files.

2016年12月5日 · There are 256 different char values that might be returned by getc() and stored in a char variable like keep[0] (yes, I'm oversummarising wildly). To detect end-of-file reliably, EOF has to have a value different from all of them. That's why getc() returns int rather than char: because a 257th distinct value for EOF wouldn't fit into a char.

Also remember that if you type in 25 characters and Enter, the first getc will not return until all 25 characters have been typed in and you hit Enter. Reading a character at the time it is typed requires platform-specific code.

2016年2月12日 · Always store the return value of getchar (fgetc, getc...) (and putchar) initially into a variable of type int. The argument to putchar can be any of int , char , signed char or unsigned char ; its type doesn't matter, and all of them work the same, even though one might result in positive and other in negative integers being passed for ...

2020年3月13日 · Think about what getc() does: It reads (or "consumes") a character from the input. If you call it twice, as you do in your loop, it reads two chacacters. If you call it twice, as you do in your loop, it reads two chacacters.

2012年7月7日 · The getc() function returns a result of type int, so you should definitely make tempChar an int. The reason for this is that it can return either a valid character value (which will fit in a char object) or the value EOF which is typically -1 .

2017年6月12日 · Here is the documentation for GETC. GETC - Read a single character from the keyboard. The character is not echoed onto the console. Its ASCII code is copied into R0. The high 8 bits of R0 are cleared. Your issue is using R0 for everything as the ld r0, newline will clobber the character you read in.

2011年8月2日 · getc (stdin) reads keyboard input to integers, but what if I want to read keyboard input to character strings? #include "stdafx.h" #include "string.h" #include "stdio.h" void CharReadWrite(FILE *f...