I wanted to make a simple program that writes chracters in a file but i didnt want to press enter .So i found the getchar which doesnt need enter.If i pass (int) getchar to putc ,in the file it shows a P character.The (int) getchar says it is equal to1734747216 so i do (int) getchar-1734747216 and it gives -62259200 and i cant understand why doesnt it give 0 and what is the P symbol since i didnt press any button?So i found that P symbol is the value of (char*)getchar and i wrote this code
Code:
#include <stdio.h>
int main()
{
FILE* text;
char* compare=(char*)getchar;
int temp=0;
text=fopen("C:\\cat.txt","w+");
while(1)
{
if ((char*)( temp = (int)getchar )!= compare)
{
putc(temp,text);
}
}
return(0);
}
Also if i change the != with == then the txt has iside it a P symbol as expected but the one with the != still doesnt work as expected
by me
Last edited by fireblast; 12-05-2010 at 12:43 AM..
hey everyone!
got another problem here.
how would i use the getchar() in a prompt:
Press any key to continue
the way i did it was to define a char variable named ch
and then wrotechar ch
...
ch = getchar();
printf("Press any key to continue");
getchar():if you press enter it exits, but... (2 Replies)
There's a replacement in bash for getchar or get functions of C and C++?Those functions read the next char avaliable in the input stream.
I've tried something like:
OLD_STTY=`stty -g`
stty cbreak -echo
look=`dd if=/dev/tty bs=1 count=1 2>/dev/null`
stty $OLD_STTY
But it is not working... (3 Replies)
Hi,
I would like to read an input from keyboard using getchar. However, if no input (No Carriage return/new line none whatsoever) is given after say, 5 seconds, I would like to skip the getchar and move on. How do I do this in C. I'm using GNU compiler set.
Thanks, (5 Replies)
Hi,
What happens to process state when getchar() is called? I wrote a C code in which I call getchar() somewhere down the road. I forgot about that, I started the process, put it in bg and disowned it using "disown". Now, how do I see where that process has gone/how do kill it?
Thanks,
Amrut (1 Reply)
Im a newbie to programming language, i found tat there r these function called printf and putchar() as well as scanf and getchar(), im curious abt why do dey hav these 2 different function although dey r doing the same instruction? :confused: (13 Replies)
Discussion started by: kris26
13 Replies
LEARN ABOUT DEBIAN
explain_getchar_or_die
explain_getchar_or_die(3) Library Functions Manual explain_getchar_or_die(3)NAME
explain_getchar_or_die - input of characters and report errors
SYNOPSIS
#include <libexplain/getchar.h>
void explain_getchar_or_die(void);
DESCRIPTION
The explain_getchar_or_die function is used to call the getchar(3) system call. On failure an explanation will be printed to stderr,
obtained from explain_getchar(3), and then the process terminates by calling exit(EXIT_FAILURE).
This function is intended to be used in a fashion similar to the following example:
int c = explain_getchar_or_die();
Returns:
This function only returns on success. On failure, prints an explanation and exits.
SEE ALSO getchar(3)
input of characters
explain_getchar(3)
explain getchar(3) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2008 Peter Miller
explain_getchar_or_die(3)
12-05-2010
