Any other way to print on the screen instead of printf() and fprintf() in C?

问题

I'm programming with gcc in CentOS 5.5 and the most of time I use printf() and fprintf() to print on terminal, but in some websites I've seen that some people use write(). I want to know if there's other ways to print on terminal.

Thanks.

回答1:

There are some major differences between these functions.

The standard library provides some functions to output to stdout: printf, puts, putchar etc.
And some functions to output to a stream, you can specify the stream to stdout: fprintf, fputs, fwrite, etc.
But write is different, it's a low-level I/O function. The standard library doesn't provide any low-level I/O functions. For example, POSIX provides write that can output to a file descriptor.

Google for how to use each one of them.

回答2:

You could use puts() or putchar().

puts("Hello, world!\n");

There's a also fputs(), putc(), and fputc() if you want/need to specify a FILE* to write to.

回答3:

All the output functions in the C standard I/O library could be used:

fprintf()
fputc()
fputs()
fputwc()
fputws()
fwprintf()
fwrite()
printf()
putc()
putchar()
puts()
putwc()
putwchar()
vfprintf()
vfwprintf()
vprintf()
vwprintf()
wprintf()

Most of the other write-like functions in POSIX could be used (but a few are reserved for sockets and those probably can't be used).

aio_write()
dprintf()
putc_unlocked()
putchar_unlocked()
pwrite()
vdprintf()
write()
writev()

There are many functions in the curses library that could be used.

来源：https://stackoverflow.com/questions/19919764/any-other-way-to-print-on-the-screen-instead-of-printf-and-fprintf-in-c

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