Week 9: Wednesday
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Q1. (35)

Input two strings s and t from the user.  Assume that the strings do not
contain blank or any whitespace character.

Write a function that concatenates t to s, i.e., it modifies s by appending t to it.

The parameters of the function concat contains only pointers to characters (not
arrays):
	void concat(char *s, char *t)

Avoid using notations of the form *(s + i) that simulates s[i].

Q2. (65)

Write a program that left rotates an array. The program inputs an integer array
of size 10, the elements of the array and an integer k. The array must be left
rotated k places.  Note that k can be negative, in which case, the array should
be right rotated k times.

For example,
if the input is
0 1 2 3 4 5 6 7 8 9 and k is 2,
the output should be
2 3 4 5 6 7 8 9 0 1

If the input is
0 1 2 3 4 5 6 7 8 9 and k is -3,
the output should be
7 8 9 0 1 2 3 4 5 6

You cannot use another temporary array.  You can swap two elements of the
array.  Also, you cannot simply left rotate the array k times by shifting it
through 1 place each time.