Determine whether this character is printable.
This function determines whether a given character is a printable character (a non-control character). 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 printable character: ",string1);
returni=sds_isprint(string1[0]);
if (returni == 0)
sds_printf("\nThe character is NOT printable. ");
else
sds_printf("\nThe character IS printable. ");
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Programming Overview of SDS™ (Solutions Development System™)