PUTC(3S) PUTC(3S) NAME putc, putchar, fputc, putw - put character or word on a stream SYNOPSIS #include <stdio.h> int putc(c, stream) char c; FILE *stream; int putchar(c) int fputc(c, stream) FILE *stream; int putw(w, stream) FILE *stream; DESCRIPTION Putc appends the character c to the named output stream. It returns the character written. Putchar(c) is defined as putc(c, stdout). Fputc behaves like putc, but is a genuine function rather than a macro. Putw appends word (that is, int) w to the output stream. It returns the word written. Putw neither assumes nor causes special alignment in the file. SEE ALSO fopen(3S), fclose(3S), getc(3S), puts(3S), printf(3S), fread(3S) DIAGNOSTICS These functions return the constant EOF upon error. Since this is a good integer, ferror(3S) should be used to detect putw errors. BUGS Because it is implemented as a macro, putc treats a stream argument with side effects improperly. In particular putc(c, *f++); doesn’t work sensibly. Errors can occur long after the call to putc. 7th Edition November 6, 1985 PUTC(3S)