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#include <ctype.h>int ispunct(int ch);
The ispunct( ) function returns nonzero if ch is a punctuation character; otherwise, zero is returned. The term “punctuation,” as defined by this function, includes all printing characters that are neither alphanumeric nor a space.
Related functions are isalnum( ), isalpha( ), iscntrl( ), isdigit( ), isgraph( ), and isspace( ).
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