putwchar
if (putwchar(wch) == WEOF)
wint_t putwchar(wchar_t);
if (putwchar(ch) == WEOF) \
putwchar(ch) == WEOF)
putwchar('\n');
(void)putwchar('\t');
putwchar('\n');
(void)putwchar('\t');
putwchar('\n');
(void)putwchar(ch);
(void)putwchar(ch);
(void)putwchar('\n');
putwchar(' ');
putwchar(' ');
putwchar(' ');
putwchar(' ');
putwchar('\b');
putwchar(wc);
putwchar(wc);
putwchar(c);
putwchar('\n');
putwchar('\t');
putwchar(' ');
putwchar('\n');
putwchar('\n');
putwchar(' ');
putwchar(ch);
putwchar(ch);
putwchar(ch);
putwchar(ch);
putwchar(ich);
putwchar('\n');
putwchar(delim[cnt]);
putwchar(ch);
putwchar('\n');
putwchar(*t);
putwchar('\n');
(void)putwchar(ch);
(void)putwchar(ch);
(void)putwchar(ch);
(void)putwchar(ch);
(void)putwchar(ch);
putwchar('\f');
putwchar('\n');
putwchar('\r');
putwchar(*cp);
putwchar('\r');
putwchar(*cp=='_' ? ' ' : *cp);
putwchar('\r');
putwchar(*cp=='_' ? ' ' : *cp);
putwchar(*cp);
putwchar('\n');
return (putwchar(c) != WEOF ? c : EOF);
putwchar(c);
putwchar('\t');
putwchar('\t');
putwchar(' ');
putwchar('\b');
putwchar('\n');
putwchar(ch);
putwchar(ch);
putwchar('\n');
#define PUTC(c) if (putwchar(c) == WEOF) err(1, NULL);