ascii string question

[transgalactic2]

how to check that a strings chars are sorted in an ascending order regarding their ascii code
and consist only for this ranges a-z A-Z

??

how to extract the ascii code from each cell??

[cyberfish]

loop through the string, return false if you get to something not in a-z A-Z, or an element smaller than the last. Return true if you reach the end.

[sergioms]

//
// 1 = Upper Char (A-Z)
// 2 = Lower Char (a-z)
// 0 -  Not Alpha Char.
//
int CheckIsAlpha (char pchar){
	int iASCIIcode;
	
	iASCIIcode = pchar;
	
	if (iASCIIcode >= 65 || iASCIIcode <= 90)
			return 1;
	
	if (iASCIIcode >= 97 || iASCIIcode <= 122)
			return 2;
			
	return 0;
}

[matsp]

//
// 1 = Upper Char (A-Z)
// 2 = Lower Char (a-z)
// 0 -  Not Alpha Char.
//
int CheckIsAlpha (char pchar){
	int iASCIIcode;
	
	iASCIIcode = pchar;
	
	if (iASCIIcode >= 65 || iASCIIcode <= 90)
			return 1;
	
	if (iASCIIcode >= 97 || iASCIIcode <= 122)
			return 2;
			
	return 0;
}

Surely this is at least easier to read, even if it doesn't really fix problems with EBCDIC and other non-ASCII characters sets:

	if (iASCIIcode >= 'A' || iASCIIcode <= 'Z')
			return 1;
	
	if (iASCIIcode >= 'a' || iASCIIcode <= 'z')
			return 2;

Saves trying to remember what the ascii codes are for different letters.

--
Mats

[tabstop]

And what's wrong with isalpha, while we're here?

[cpjust]

//
// 1 = Upper Char (A-Z)
// 2 = Lower Char (a-z)
// 0 -  Not Alpha Char.
//
int CheckIsAlpha (char pchar){
	int iASCIIcode;
	
	iASCIIcode = pchar;
	
	if (iASCIIcode >= 65 || iASCIIcode <= 90)
			return 1;
	
	if (iASCIIcode >= 97 || iASCIIcode <= 122)
			return 2;
			
	return 0;
}

Yuk! Magic numbers.
Use 'A' instead of 65, 'Z' instead of 90...
Also, there's no point in saving the char in an int first.

[Dino]

Why all the fuss?

int CheckIsAlpha (char pchar) {	
	return isalpha(pchar) ? ( islower(pchar) ? 2 : 1  ) :  0 ; 
}