/* Test whether a basic isalnum invocation works. */ #include #include "../basic.h" int main(void) { char c1 = 'a'; char c2 = '@'; if ( !isalnum(c1) ) errx(1, "isalnum('%c') was not true", c1); if ( isalnum(c2) ) errx(1, "isalnum('%c') was not false", c2); return 0; }