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C COMPILER LIBRARY FUNCTIONS->Detailed Descriptions->isalnum()

Summary

#include <ctype.h>

    
int isalnum(int c);Test for alphanumeric ('A'-'Z', 'a'-'z' or '0'-'9')

Parameter

c    Integer to be tested


Description

This function tests the integer passed to it to see if it is an lphanumeric character: 'A'-'Z', 'a'-'z' or '0'-'9'.

The ASCII character set is assumed.


Return Value

TRUE (1) is returned if the character is alphanumeric, otherwise FALSE (0) is returned.