sds_isalnum

int sds_isalnum (int val);


Determine whether this character is alphanumeric.


This function determines whether a given character is alphanumeric (A - Z and a - z and 0 - 9). The argument val is the ASCII value for a character.

This function returns non-zero if the given character is alphabetical. Otherwise, it returns zero.

Example

int returni;

char string1[512];

sds_getstring(1,"\nEnter a character: ",string1);

returni=sds_isalnum(string1[0]);

if (returni == 0)

sds_printf("\nThe character is NOT alphanumeric. ");

else

sds_printf("\nThe character IS alphanumeric. ");

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Programming Overview of SDS™ (Solutions Development System™)