Thread: Help with grouping & ignoring pronunciation

I have this simple program that ciphers text.
Original Alphabet: ABCDEFGHIJKLMNOPQRSTUVWXYZ
Substitution Alphabet: GHIJKLMNOPQRSTUVWXYZABCDEF
The program works for me but im having trouble editing my output.

For example if I input the following statement:
I came, I saw, I conquered!
My current output is:
O igsk, O ygc, O iutwakxkj!

But I need to find a way to ignore the white space, and all of the punctuation, and then i also need to group the characters into 5.
In other words i need the output to be:
Oigsk OygcO iutwa kxkj

Any tips on how to do this? I just started C programming and this is allready way out of my league!

Can someone also look at my code to see if everything i have down is needed. I just put alot of stuff down, and im not sure if it all needs to be there, but it works :)

Code:

#include <stdio.h> 
#include <ctype.h> 
#define ESC 27  

int main(){  /* function main */
	int i;  /* declare a variable named i of type int */
	char ch = 0; /* declare a variable named ch of type char */
	char *alpha = "abcdefghijklmnopqrstuvwxyz";  /* declare a char pointer to the beginning of the alphabet */ 
	char *key = "ghijklmnopqrstuvwxyzabcdef";  /* declare a char pointer to the beginning of the key */
	while( ch != ESC ){  /* do the following while the escape character is not present */
	ch = fgetc( stdin );  /* store a character entered from standard input into ch */
	if( isalpha( ch ) ) {  /* do the following if ch is a letter */
              	for( i = 0 ; i < 26 ; ++i ){  /* for( INIT ; LOOP WHILE THIS IS TRUE ; MANIPULATE ) */
                 	if( alpha[ i ] == tolower( ch ) ){  /* if the character residing at alpha + offset i = ch */
                    	ch = /* we're going to assign something to ch */
                    	( isupper( ch ) ) ?  /* is ch uppercase? */
                    	( toupper( key[ i ] ) ) : /* if so assign to ch the upercase version of key at offset i */
                    	key[ i ];  /* otherwise use the already lowercase defualt */
                    	break; /* break because we found it and no longer need to search */
                 	} /* end if block */
             		} /* end for block */
	}  /* end of if block */
	fputc( ch, stdout );  /* put the character back to standard output */
}
return( 0 );  /* return control to the operating system */
}  /* end main block */

Thanks! Works like a charm!

things like this really make me appreciate perl.