The roots of the quadratic equation ax2+bx+c=0. In this formula, the term is called discriminant. If , then the equation has a single (repeated) root. If the equation has two real roots. If , the equation has two complex roots ie no real roots. Using the concept of passing values to a function write a C++ program that computes real roots of a quadratic equation.
#include<iostream> #include<cmath> using namespace std;
double a, b, c, D, x1, x2;
cout<<"enter the coefficient a: "; cin>>a; cout<<"enter the coefficient b: "; cin>>b; cout<<"enter the coefficient c: "; cin>>c;
D = b*b-4*a*c; if (D==0) cout<<"the single root is "<<-b+sqrt(D)/(2*a)<<"\n"; if (D<0)& cout<<"there are no roots.\n"; if (D>0)& cout<<"The roots are:\n"<<-b+sqrt(D)/(2*a)<<"\n"<<-b-sqrt(D)/(2*a)<<"\n";