C/wctype.h/iswprint
int iswprint(wint_t ch) vs isprint()
#include <stdio.h>
#include <wctype.h>
int main(void)
{
int wc;
for (wc=0; wc <= 0xFF; wc++) {
printf("%3d", wc);
printf(" %#4x ", wc);
printf(" %c", iswprint(wc) ? wc : " ");
putchar("\n");
}
}