StringCchCat don't work at the first time

[Franconet]

Hi,someone could explain to me why this code

  for (i=3;i<argc-1;i++) 
   {
 
   StringCchCat(argv[2],MAX_PATH,TEXT("-")); 
   StringCchCat(argv[2],MAX_PATH,argv[i]); 

   }

whit this input: myprogram cartel s s s

output this s--s and not what i expected that is s-s-s
i'm getting crazy...
Thank you

[AbstractionAnon]

argv should be considered const. You should not be appending to it.

[Franconet]

You are right!
but why it don't work only the first time?


SOLUTION

    StringCchCopy(goal, MAX_PATH, argv[2]);
   
   for (i=3;i<argc-1;i++) 
   {
 
   StringCchCat(goal,MAX_PATH,TEXT(" ")); 
   StringCchCat(goal,MAX_PATH,argv[i]); 

   }
 
   
    _tprintf(TEXT("The goal  is find  %s\n\n"), goal);