Finding Hex

[rajeevktripathi]

Hi All I have been puzzelled in a problem, What have to do is, that I have some file names ( like 000001.doc, programming.doc, etc.) now I have to find out the files that are in hexadecimal (leaving file extension). Please guide me to find out this Thanks

[David Crow]

Use isxdigit() on the file's name.

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"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

[capricious_001]

1. Retrieve the file list 2) Loop through each file. For every File name, loop through its name until the extension is reached and check to see if each character is either [0-9] or [A-F]. If its not, just do continue; and start back at the beginning of the loop again. Use this website to utilize the ANSI character set. http://www.alanwood.net/demos/ansi.html Remember, the letters can be either lower case or uppercase and have different ANSI codes. 3) Record the file names in an array. (Create a dynamic allocated array for big file names). Robbie

[capricious_001]

Ahh david's is a much easier way. Its in the following library as well! #include int isxdigit(int c);

[Viorel]

Try this idea:

char name[100] = "......." ; // the file's name without extension
char * p;
strtoul(name, &p, 16);

if( *p == 0)
{
    // the name is like a hexadecimal number, or is empty
}
else
{
    // the name is not like a hexadecimal number
}

Hope it helps.