Thread: not taking command line arguments

Code:

# include <stdio.h>

int main (int argc, char* argv[])
{   
    int i;
    printf("number of arguments: %d\n",argc);
    printf("name of program %s\n",argv[0]);
    
    for (i=1; i<argc; i++)
      printf("user val = %d : %s\n",i,argv[i]);
      
    system("pause");
    return 0;
}

Your code.... when compiled on pelles C .... and run from a command window...




It works just fine... run it outside the IDE... you'll see.

Also DEVC++ is way out of date... maybe you should consider updating to Pelles C or MinGw...

Originally Posted by suryak

Then I think. there is a problem with the compiler/ IDE.
Thanks for helping

By default, if running your program within an IDE, command line arguments are not supplied.

There is usually some IDE-specific configuration option (found through menus or setting dialogs) that allows you to specify command line arguments that the IDE will supply to your program. You need to find that option and use it, (and also ensure any settings are saved into configuration files - with some IDEs the setting is not saved, and needs to be re-entered every time you run your program).

You can't do that. The command line arguments are constants inside the program.

If you want to get input from the user use an internally declared variable... like this...

Code:

char userval[100];

if (! strlen(argv[x]))
  { please enter argument %d : ",x);
    scanf(" %100s",userval); }
else
  strcpy(argv[x],userval);

printf("%s", userval);

argv[1] is of type char *. input() expects an argument of type char ** (note the extra asterix) or, nominally, an array of char *.