problem 1:
prepare down a C program to convert from one base to another base in number system.
problem 2:
prepare down a C program to create Fibonacci numbers using recursion.
problem 3:
prepare down a C program to create a multiplication table.
problem 4:
prepare down a C program to find out the sum of N natural numbers.
problem 5:
prepare down a C program to find out the GCD of two integer values.
problem 6:
prepare down a C program to verify if the year is the leap year.