This documentation is copyright © 1998-2001 Sandro Sigala <sandro@sigala.it>.
All rights reserved.
Released under the GNU General Public License.
atoi
Prototype
#include <stdlib.h>
int atoi(const char *s);
Description
Converts the argument string s
to an integer. Returns the converted
value of the input string s
.
Example
#include <stdio.h>
#include <stdlib.h>
/*
* twotimes.c: print the argument number multiplied by 2.
* usage: twotimes <number>
*/
int main(int argc, char **argv)
{
if (argc > 1)
printf("Two times %s is %d\n", argv[1], atoi(argv[1]) * 2);
return EXIT_SUCCESS;
}
References
ISO C 9899:1990 7.10.1.2