how do i write a asci-char withthe number?

kalleanka · 03-28-2008, 06:06 AM

is it like this 0x48 for 0?

colucix · 03-28-2008, 06:09 AM

In which language?

kalleanka · 03-28-2008, 06:15 AM

cccccccccccccccc

kalleanka · 03-28-2008, 06:55 AM

ok I found it its \048 for 0

colucix · 03-28-2008, 06:59 AM

or simply print a number as a character:

Code:

printf("%c\n",48);

matthewg42 · 03-28-2008, 07:06 AM

You can see a list of ASCII codes in the ascii manual page:

Code:

man ascii

Octal values in C can be written in 0NNN format, hex in 0xNN, and decimal as normal. You can also just write the character in single quotes.
To illustrate:

Code:

#include <stdio.h>

int main(int argc, char** argv)
{
        if ('A' == 65)   { printf("sane decimal\n"); }
        if ('A' == 0x41) { printf("sane hex\n"); }
        if ('A' == 0101) { printf("sane octal\n"); }
        return 0;
}

matthewg42 · 03-28-2008, 07:08 AM

Quote:

Originally Posted by colucix

or simply print a number as a character:

Code:

printf("%c\n",48);

And you can do this too:

Code:

#include <stdio.h>

int main(int argc, char** argv)
{
        printf("char=%c dec=%d hex=%x octal=%o\n", 'A', 'A', 'A', 'A');
        return 0;
}

colucix · 03-28-2008, 07:50 AM

Thank you, matthewg42 for the clarification. I also discovered that you can do the opposite:

Code:

#include <stdio.h>

int main(int argc, char** argv)
{
        printf("%c %c %c\n",0101,0x41,65);
        return 0;
}

I thought it wasn't possible.

osor · 03-28-2008, 04:28 PM

The ASCII values for the digits 0-9 were chosen to coincide with the binary values of the digit prefixed with the binary 0011. So for a digit a from 0 to 9, its ASCII representation is 0x30 + a (e.g., for 4 it’s 0x34).

This gives you an easy way to obtain the digit itself as well. If you are confident that an ASCII char is holding a digit, then to get the digit, you just ^ (XOR) with 0x30.

simplicissimus · 03-29-2008, 07:26 AM

'kalleanka' - isn't that the finnish name for Donald Duck?

exscape · 03-29-2008, 09:58 AM

Quote:

Originally Posted by simplicissimus

'kalleanka' - isn't that the finnish name for Donald Duck?

Swedish

(And no, the languages are NOT similar - I barely know five finnish words!)

kalleanka · 04-28-2008, 12:53 PM

AKU ANKKA is the finnish.

Kalla Anka swedish.