A simple C Function

stringCompareDif

char * stringCompareDif(char *string1, char *string2, char *result) {
	int string1length = strlen(string1);
	int string2length = strlen(string2);
	int length = 0, d = 0;

	if (string1length == string2length)
		length = string1length;
	else if (string1length > string2length)
		length = string1length;
	else if (string1length < string2length)
		length = string2length;

	for (int i = 0; i < length; i++)
	{
		if (string1[i] != string2[i]) {
			result[d] = string2[i];
			d++;
		}
	}
	return result;
}