Shoutbox

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:

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/* 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();
}

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Someone please help quick

And dz why does the [code] tag parse emotes

quote:

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

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__toascii(integer)

quote:

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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.

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Char character = integer should work I think.

quote:

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Originally posted by Juzzi

quote:

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

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can you just typecast a char to an int to get the ascii value, or is that just in C++?

quote:

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Originally posted by Madman
can you just typecast a char to an int to get the ascii value, or is that just in C++?

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Erm .... im still a c newb if you didnt realise that from my coding style
Yeah i know typecasting and all ..... but i dont think you can do it like that .....
Its something like

code:

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print("%something here",some special method of calling the variable);

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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

quote:

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Originally posted by Juzzi
__toascii(integer)

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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

quote:

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Originally posted by John Anderton

quote:

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Originally posted by Madman
can you just typecast a char to an int to get the ascii value, or is that just in C++?

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Erm .... im still a c newb if you didnt realise that from my coding style
Yeah i know typecasting and all ..... but i dont think you can do it like that .....

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Well you can do it just using

code:

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int nAscii = (int)cChar;//cChar beeing a char variable

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in C++ but i dont know if you can in C, give it a shot and find out (whats the worst that can happen )

quote:

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Originally posted by John Anderton

code:

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print("%something here",some special method of calling the variable);

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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

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To output a interger as the number value using printf you'd use.

code:

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printf("%d", anInterger);

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

quote:

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Originally posted by Madman
To output a interger as the number value using printf you'd use.

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What i meant is that i heard that there is a way to do that whole thing in one printf statement

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

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:

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

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

EDIT:

quote:

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

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I got that a long time back
thanks but keep trying .....

How about

code:

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int num = (int)'A'

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So if m is a char:

code:

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

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I don't do C++ but I know a lot of programming languages and this is a method that is sometimes used...

quote:

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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

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

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code:

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printf("%d",a);

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code:

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

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quote:

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Originally posted by segosa

code:

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printf("%d",a);

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code:

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

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

Thanks

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:

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int getchar(void);

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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.