putc               35 printf.c           putc(fd, buf[i]);
putc               54 printf.c               putc(fd, c);
putc               69 printf.c                 putc(fd, *s);
putc               73 printf.c               putc(fd, *ap);
putc               76 printf.c               putc(fd, c);
putc               79 printf.c               putc(fd, '%');
putc               80 printf.c               putc(fd, c);