https://www.emblogic.com/blog/01/6031/ Embedded System and ARM Training Mon, 07 Oct 2013 04:00:03 +0000 hourly 1 http://wordpress.org/?v=3.9.1 https://www.emblogic.com/blog/01/6031/#comment-3629 Sat, 02 Feb 2013 03:35:49 +0000 http://emblogic.org/blog/?p=6031#comment-3629 Actually argc and argv are command line parameters. argc means number of commands entered via command line and the entered command is stored as a string in argv which is a character of pointers.
lets take an example
when we want to execute a program we type the command as
root@localhost~]#./a.out
This command is treated as 1 by argc and the ./a.out is stored in argv[0].
To get the result you can write a simple program as
int main(int argc,char *argv[])
{
printf(” Command number: %d\n”,argc);
printf(” Command name: %s\n”,argv[0]);
return 0;
}
Subsequently the number of commands entered are stored in argv for example
root@localhost~]#./a.out hello world
argv[0] – ./a.out
argv[1] – hello
argv[2] – world
and number of commands are three

]]>