char combine(char string1[MAXINPUT], char string2[MAXINPUT]) {
	int count1, count2 = 0;   // you didn't initialize count1, so=> int count1 = 0, count2 = 0;
                         
	while (string1[count1] != '\0')
		++count1;

	while (string2[count2] != '\0')
		string1[count1++] = string2[count2++];
	string1[count1] = '\0';
	return string1;
}