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C Programming Question
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John Anderton
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O.P. C Programming Question
I have made a few programs viz the pascals triange (it took me 10 mins to figure out how to print out the numbers in a perfect triangle) and fibonnici series (easy |-)  1 1 2 3 5 8 13 21 34 55)

But i still dont know how i can print the asci value of a number .....

Question 1: Given a character variable, how can you print its ascii value

Question 2: Taking the input from the keyboard convert it (digit or an alphabet) into the corresponding alphabet or digit (respectively) by using the ascii chart.

So far i have done so much ..... really nothing much |-)
TurboC doesnt allow pasting here :( ....
* John Anderton opens file in notepad ....

code:
/* Header Files */
#include <stdio.h>
#include <conio.h>

/* Global Variables */
char a;

void main ()
{
/* Clean Slate */
clrscr();

/* Input */
printf("Enter a alphanumerical character (ie Alphabet or a digit ");
a = getchar();
putchar('\n');

/* If loop to identify datatype */
if (isalpha(a) > 1)
printf("%c",a);
/* Correction reqd there ^^ */

else if (isdigit(a) > 1)
printf("%c",a);
/* And there too ^^ */

else
printf("Only alpha numericals alowed. %c is now allowed",a);

/* Applying glue on the output screen */
getch();
}


Someone please help quick ;)

And dz why does the [code] tag parse emotes :-/
:blah:

This post was edited on 10-03-2005 at 06:50 PM by John Anderton.
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10-03-2005 06:48 PM
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Yousef
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RE: C Programming Question
quote:
Question 1: Given a character variable, how can you print its ascii value
__toascii(integer)

quote:
Question 2: Taking the input from the keyboard convert it (digit or an alphabet) into the corresponding alphabet or digit (respectively) by using the ascii chart.
Char character = integer should work I think.
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10-03-2005 07:03 PM
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Plik
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RE: RE: C Programming Question
quote:
Originally posted by Juzzi
quote:
Question 1: Given a character variable, how can you print its ascii value


can you just typecast a char to an int to get the ascii value, or is that just in C++?
10-03-2005 07:06 PM
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John Anderton
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O.P. RE: C Programming Question
quote:
Originally posted by Madman
can you just typecast a char to an int to get the ascii value, or is that just in C++?
Erm .... im still a c newb if you didnt realise that from my coding style :P
Yeah i know typecasting and all ..... but i dont think you can do it like that .....
Its something like
code:
print("%something here",some special method of calling the variable);

usually we say printf("%c",a); but here it should be something like printf("%c",'a'); but that doesnt work ..... and i cant find it in any book :sad:

quote:
Originally posted by Juzzi
__toascii(integer)
Since i havent learned that .... teacher will be suspicious .... still there must be a header file reqd ... what is it .... and whats the syntax .... ill find it in my book or on google i guess 8-)
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10-03-2005 07:18 PM
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Plik
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RE: C Programming Question
quote:
Originally posted by John Anderton
quote:
Originally posted by Madman
can you just typecast a char to an int to get the ascii value, or is that just in C++?
Erm .... im still a c newb if you didnt realise that from my coding style :P
Yeah i know typecasting and all ..... but i dont think you can do it like that .....

Well you can do it just using
code:
int nAscii = (int)cChar;//cChar beeing a char variable
in C++ but i dont know if you can in C, give it a shot and find out :P (whats the worst that can happen ;))
quote:
Originally posted by John Anderton
code:
print("%something here",some special method of calling the variable);
usually we say printf("%c",a); but here it should be something like printf("%c",'a'); but that doesnt work ..... and i cant find it in any book :sad:
To output a interger as the number value using printf you'd use.
code:
printf("%d", anInterger);

P.S Dont worry if im wrong i havnt been coding with c for very long either :P

This post was edited on 10-03-2005 at 07:32 PM by Plik.
10-03-2005 07:25 PM
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John Anderton
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O.P. RE: C Programming Question
quote:
Originally posted by Madman
To output a interger as the number value using printf you'd use.
What i meant is that i heard that there is a way to do that whole thing in one printf statement 8-)

Damn ..... why didnt i write it down :sad:

Neways ill try that nAscii idea of yours tho im not that hopeful .... if anyone knows about it then help me .....
I got an idea like if i tell the compiler that a variable ( m ) .....

code:
if (m >= 'A' || m >= 'Z')
printf("It is a capital letter");

Will that work 8-) I know i can use the conversion type functions calling "ctype.h" and the using functions like isalpha(a), isupper(a) and/or islower(a) ..... but thats a different approach cause the question says that i should use the ascii values :sad:

EDIT:
quote:
Originally posted by Madman
P.S Dont worry if im wrong i havnt been coding with c for very long either :P

I got that a long time back :P
;) thanks but keep trying .....

This post was edited on 10-03-2005 at 07:36 PM by John Anderton.
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10-03-2005 07:33 PM
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J-Thread
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RE: C Programming Question
How about

code:
int num = (int)'A'

So if m is a char:
code:
if ((int)m >= (int)'A' || (int)m >= (int)'Z')
printf("It is a capital letter");

I don't do C++ but I know a lot of programming languages and this is a method that is sometimes used...
10-03-2005 08:27 PM
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segosa
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RE: RE: C Programming Question
quote:
Originally posted by John Anderton
What i meant is that i heard that there is a way to do that whole thing in one printf statement 8-)

Damn ..... why didnt i write it down :sad:



code:
printf("%d",a);

code:
if (m >= 'A' || m <= 'Z')
  printf("It is a capital letter");


This post was edited on 10-04-2005 at 06:10 AM by segosa.
The previous sentence is false. The following sentence is true.
10-04-2005 06:09 AM
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John Anderton
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O.P. RE: C Programming Question
quote:
Originally posted by segosa
code:
printf("%d",a);

code:
if (m >= 'A' || m <= 'Z')
  printf("It is a capital letter");



Yeah now why didnt i think of that .... thanks seg .... i think thats it ;)

:bow: Thanks :)
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10-04-2005 07:45 AM
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RaceProUK
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RE: C Programming Question
A quick explanation of why it works:

In C, as in many programming languages, the char datatype is basically a number. Therefore, integer comparisons are possible, even without typecasts, and using %d in a printf is also perfectly valid.
As an example, take getchar(). It's signature is
code:
int getchar(void);
It gets a character from the keyboard (stdin), and returns it as unsigned. This leaves the negative values of int free for error codes.
Put simply:
0-255 is a valid character
<0 is an error.

Edit: Of course, once you've checked it's positive, you will need to typecast into a char. char is typically 8 bits, int 16/32 bits.

This post was edited on 10-04-2005 at 10:46 AM by RaceProUK.
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