Error: String subscript out of range

[couriercarry]

Hello all,

New member to this forum, excited to be here.

Im getting the subject line error with the below code. I have a linked list of chars that Im trying to place into strings in order to compare the two. Not sure why Im receiving this error...

bool LINK::Is_Equal(const LINK& test) {
	string word1 = "", word2 = "";
	character* nav = front;
	int i = 0;
	while (nav != NULL)
	{
		word1[i] = nav->symbol;
		nav = nav->next;
		i++;
	}

	nav = test.front;
	i = 0;
	while (nav != NULL)
	{
		word2[i] = nav->symbol;
		nav = nav->next;
		i++;
	}

	return word1.compare(word2);
}

It seems to run through the first iteration for word1 without any issues, then throws the error on the second run.

Any help would be greatly appreciated. Thanks!

[Peter87]

The subscript operator can only be used to access existing characters in the string. If you want to add a new character to the end of the string you can use += or push_back.

http://www.cplusplus.com/reference/string/string/operator+=/
http://www.cplusplus.com/reference/string/string/push_back/