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Old 07-24-2011, 06:42 PM   #1
Registered: Aug 2009
Posts: 182

Rep: Reputation: 15
C Arguments to main - can't compare values

Whats wrong with this:
#include <stdio.h>

int main(int argc, char *argv[])
    if(argv[4] == "-verbose")
        printf("Verbose is on");

  return 0;
I can use argv[4] in printf() just fine. But i can't compare the content of argv[] to anything.

Why ?

Kind regards Mads Nielsen
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Old 07-24-2011, 06:46 PM   #2
Registered: Feb 2009
Posts: 83

Rep: Reputation: 25
You have to use strcmp to compare two c-strings.

With '==' you compare in your case only the strings addresses, which here are never the same.
An you should always check the parameters-count (argc).

best regards
3 members found this post helpful.
Old 07-25-2011, 08:17 AM   #3
Registered: Aug 2009
Posts: 182

Original Poster
Rep: Reputation: 15
Thank you very much!


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