man_page

.TH man 3 "19 March 2019" "1.0" "_printf man page"
.SH NAME
.B _printf
- formatted output conversion
.SH SYNOPSIS
int printf(const char *format, ...);
.SH DESCRIPTION
The function produce output according to a format as described below, the output is written to stdout, the standard output stream.
.SH FORMAT
.TP
%i
 integer number
.TP
%d
 integer number, the same as %i
.TP
%c
 character
.TP
%s
 string
.SH SEE ALSO
.I printf(3)
.SH BUGS
.TP
Error 96
 double flag '+' or '-'
.TP
Error 97
 No proper character after '%'
.TP
Error 98
 No '%'
.TP
Error 99
 wrong format
=======
 string - prints (null) on null string
.SH Return value
Returns the number of characters printed (excluding the null byte used to end output to strings)
.SH Format of the format string
The format string is a character string, beginning and ending in its initial shift state, if any. The format string is composed of zero or more directives: ordinary characters (not %), which are copied unchanged to the output stream; and conversion specifications, each of which results in fetching zero or more subsequent arguments. Each conversion specification is introduced by the character %, and ends with a conversion specifier.
.SH SEE ALSO
.I printf(3), printf(1)
.SH BUGS
Return -1 at print(%) only and print(NULL)
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.SH AUTHOR
Ferney Medina, Jaiber Ramirez