| 1 | /* Example of a Variadic Function |
|---|
| 2 | Copyright (C) 1991-2022 Free Software Foundation, Inc. |
|---|
| 3 | |
|---|
| 4 | This program is free software; you can redistribute it and/or |
|---|
| 5 | modify it under the terms of the GNU General Public License |
|---|
| 6 | as published by the Free Software Foundation; either version 2 |
|---|
| 7 | of the License, or (at your option) any later version. |
|---|
| 8 | |
|---|
| 9 | This program is distributed in the hope that it will be useful, |
|---|
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
|---|
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|---|
| 12 | GNU General Public License for more details. |
|---|
| 13 | |
|---|
| 14 | You should have received a copy of the GNU General Public License |
|---|
| 15 | along with this program; if not, see <https://www.gnu.org/licenses/>. |
|---|
| 16 | */ |
|---|
| 17 | |
|---|
| 18 | #include <stdarg.h> |
|---|
| 19 | #include <stdio.h> |
|---|
| 20 | |
|---|
| 21 | int |
|---|
| 22 | add_em_up (int count,...) |
|---|
| 23 | { |
|---|
| 24 | va_list ap; |
|---|
| 25 | int i, sum; |
|---|
| 26 | |
|---|
| 27 | va_start (ap, count); /* Initialize the argument list. */ |
|---|
| 28 | |
|---|
| 29 | sum = 0; |
|---|
| 30 | for (i = 0; i < count; i++) |
|---|
| 31 | sum += va_arg (ap, int); /* Get the next argument value. */ |
|---|
| 32 | |
|---|
| 33 | va_end (ap); /* Clean up. */ |
|---|
| 34 | return sum; |
|---|
| 35 | } |
|---|
| 36 | |
|---|
| 37 | int |
|---|
| 38 | main (void) |
|---|
| 39 | { |
|---|
| 40 | /* This call prints 16. */ |
|---|
| 41 | printf (format: "%d\n" , add_em_up (count: 3, 5, 5, 6)); |
|---|
| 42 | |
|---|
| 43 | /* This call prints 55. */ |
|---|
| 44 | printf (format: "%d\n" , add_em_up (count: 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)); |
|---|
| 45 | |
|---|
| 46 | return 0; |
|---|
| 47 | } |
|---|
| 48 | |
|---|
