ispunct

isprint

#include <ctype.h>int isprint(int ch);

The isprint( ) function returns nonzero if ch is a printable character, including a space; otherwise, zero is returned. In ASCII environments, printable characters are in the range 0x20 through 0x7E.

Related functions are isalnum( ), isalpha( ), iscntrl( ), isdigit( ), isgraph( ), ispunct( ), and isspace( ).