1)write a c program to swap 2 numbers without using a third variable or pointers...

2)write a c program to multiply two numbers using recursion..

3)write a c program to find square root of a number

4)write a c program which interchanges the Jth and Kth paragraph in a text..(little on the tougher side..)

5)write a c program to print the different combinations of a word..suppose if u enter "cat" it should print cat,cta,act,atc,tac,tca...