how to append a character on argv[]?

georgewhr · 06-01-2013, 08:43 PM

Hello Guys, I m trying to append a character on each argv[].

buffer[256] = "";

for(i = 1; i < argc; i++)
{
strcat(argv[i],";");
strcat(buffer,argv[i]);
}

printf("buffer is %s", buffer);

If I type ./app hello there here, I want to have the buffer which is like hello;there;here

But the code above seems doens't work. Any idea that how can I append a character at the end of each argv?

linosaurusroot · 06-01-2013, 10:20 PM

You can't add to strings that don't have free space allocated. This should work.

Code:

strcat(buffer,argv[i]);
strcat(buffer,";");

georgewhr · 06-02-2013, 02:03 AM

Quote:

Originally Posted by linosaurusroot

You can't add to strings that don't have free space allocated. This should work.

Code:

strcat(buffer,argv[i]);
strcat(buffer,";");

Thanks bro, butI tried that it doesn't work, if I type "./app george there what",I got print out is:
george;
;
what;

georgewhr · 06-02-2013, 02:19 AM

Quote:

Originally Posted by linosaurusroot

You can't add to strings that don't have free space allocated. This should work.

Code:

strcat(buffer,argv[i]);
strcat(buffer,";");

Hey bro, it works now

thanks!