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Top Forums Programming How do I copy or rewind *argv[] Post 302543171 by Errigour on Friday 29th of July 2011 08:57:19 PM
Old 07-29-2011
How do I copy or rewind *argv[]

I'm working on my own pow function and I need to make a copy of *argv[] but
I think that I am having trouble with the size of *argv[] and the size of any array that I
make. The code below isn't working for me. and I want to accept any number no
matter the size with pow -f 2 2. I was working out the input issues but I need an
array that will copy *argv[] so that I can iterate through *argv[]. Or I need a function
that will rewind *argv[].
Code:
    char *arg[3];
     for(i=1; 1<4; i++)
     {
         if(i< argc)
             arg[i] = argv[i];
     }

Here is one of the reasons I need to rewind or copy *argv[], also this isn't
homework or anything. I am using this for my pow function and atoi doesn't check
whether or not the string itself is a number or not.
Code:
    for(;*argv[1] && !isspace(*argv[1]);*argv[1]++)

 

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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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