#include #include #include "check.h" int main() { wctrans_t x; x = wctrans ("tolower"); CHECK (x != 0); CHECK (towctrans (L'A', x) == tolower ('A')); CHECK (towctrans (L'5', x) == tolower ('5')); x = wctrans ("toupper"); CHECK (x != 0); CHECK (towctrans (L'c', x) == toupper ('c')); CHECK (towctrans (L'9', x) == toupper ('9')); x = wctrans ("unknown"); CHECK (x == 0); exit (0); }