This program calculates the roots of a quadratic equation in C++

QuadraticEquationCalculator.cpp

#include <iostream>
#include <cmath>

using namespace std;


//Function call by reference using pointers
void AskForValues(double *a_ptr, double *b_ptr,double *c_ptr)
{
	 cout << endl << "Enter your values" ;
	 cout << endl << "Enter  coefficient a " ;
	 cin >> *a_ptr ;
	 cout << endl << "Enter  coefficient b " ;
	 cin >> *b_ptr ;
     cout << endl << "Enter  coefficient c " ;
	 cin >> *c_ptr ; 
}

void CalculateResult(double a, double b, double c)
{
	double root1, root2;
	// to determine the type of root
	double value = pow(b,2) - (4*a*c);
	cout << value << endl ;
	if (value > 0){
		root1 = (-b + sqrt(value)) / (2*a);
	    root2= (-b - sqrt(value)) / (2*a);	
		cout << "Roots are real and different." << endl;
		cout << "\n The Roots of the equation are : " << root1 << " , " << root2 << endl ;
	}
	else if(value == 0){
		 root1 = (-b ) / (2*a);
		 root2 = (-b ) / (2*a);	
		 cout << "Roots are real and same." << endl;
		 cout << "\n The Roots of the equation are : " << root1 << " , " << root2 << endl ;
	}
	else if(value < 0) //  For complex roots: Imaginary and real
	{
	   root1 = (-b ) / (2*a);
	   root2 = (-b ) / (2*a);
       cout << "Roots are complex and different."  << endl;
	   cout << root1 << "+i " << (sqrt(-(value))/ (2*a)) << endl;
	   cout << root1 << "-i " << (sqrt(-(value))/ (2*a)) << endl;
	}
	
}

int main()
{
	// Intialize the variables for the parameter and array fpr the result
	double a,b,c, result[2];
	char answer;
	cout << "Welcome to Quadratic Equation Calculator" << endl ;

	do{
		AskForValues(&a,&b,&c);
		CalculateResult(a,b,c);


		// To Calculate again
		cout << endl << "Do you want to do calculate again? (Y = Yes  & N = No)" << endl;
		cin >> answer;
	}
	while(answer == 'y' || 'Y');

	system("PAUSE");
	return 0;
}