Calculate nPr & nCr

C++ Program to calculate nPr & nCr. This program calculates the value of nCr and nPr. The values of n and r are input by user. We have used 3 functions : 'npr' for calculating nPr , 'ncr' for calculating nCr , factorial to calculate factorial. nPr is calculated by the formula nPr = factorial(n)/factorial(n-r)

Maths operation exp, log, log10, sqrt, sin, cos, tan.....

 Mathematical operation program for the determination of values of:
1.exp     2.log       3.log10
4.sqrt    5.sin        6.cos
7.tan

note: use of Switch case for easy coding and choice selection between several option.

Print Roots Of Quadratic Equation...

Program to Print the Roots of a Quadratic equation.
first we find the delta as  delta=b*b-4*a*c; as done in program , then three condition are checked like:
 1 Real & Unequal
 2 Real & Equal
 3 Complex & Imaginary

(note- use of " math.h "header file for the solution of the square root of delta "sqrt(delta) " )

Mathematical Operations (+,-,*,/)

All mathematical operation can be solved in one place use of switch case for user friendly solution 

user can Add,Sub, Div and multiply