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Top Forums Programming Combining multiple command line arguments Post 302305497 by hansel13 on Thursday 9th of April 2009 05:18:05 AM
Old 04-09-2009
Combining multiple command line arguments

suppose the user enters:
Code:
./Myfile blah1 blah2 blah3

I want to be able to read that in as:
Code:
blah1blah2blah3

IN ONE VARIABLE

Obviously I can print it out in one line excluding the white space, but I'm having trouble combining argv[1], argv[2], ....., argv[i] together!

This is what I tried, but I clearly have no clue what I'm doing, because it didn't work:

Code:
int main(int argc, char* argv[])
{
    i = 1;

    while(argv[i] != NULL)
    {
        if(i > 1)
        {
            argv[1] = strncat(argv[i],argv[1],1000);
        }
        //printf("STRING LENGTH IS: %d", strlen(argv));
        printf("%s\n\n", argv[1]);
        i++;
    }

}


Can someone help me out? I'm stuck on probably the easiest part of this assignment, because I don't know what to use to combine each argument! I've been trying to figure this out for hours...

Last edited by Yogesh Sawant; 04-09-2009 at 07:27 AM.. Reason: added code tags
 

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Tcl_Concat(3)						      Tcl Library Procedures						     Tcl_Concat(3)

__________________________________________________________________________________________________________________________________________________

NAME
Tcl_Concat - concatenate a collection of strings SYNOPSIS
#include <tcl.h> const char * Tcl_Concat(argc, argv) ARGUMENTS
int argc (in) Number of strings. const char *const argv[] (in) Array of strings to concatenate. Must have argc entries. _________________________________________________________________ DESCRIPTION
Tcl_Concat is a utility procedure used by several of the Tcl commands. Given a collection of strings, it concatenates them together into a single string, with the original strings separated by spaces. This procedure behaves differently than Tcl_Merge, in that the arguments are simply concatenated: no effort is made to ensure proper list structure. However, in most common usage the arguments will all be proper lists themselves; if this is true, then the result will also have proper list structure. Tcl_Concat eliminates leading and trailing white space as it copies strings from argv to the result. If an element of argv consists of nothing but white space, then that string is ignored entirely. This white-space removal was added to make the output of the concat command cleaner-looking. The result string is dynamically allocated using Tcl_Alloc; the caller must eventually release the space by calling Tcl_Free. SEE ALSO
Tcl_ConcatObj KEYWORDS
concatenate, strings Tcl 7.5 Tcl_Concat(3)
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