Answer to Question #288824 in C for Divya

Question

Write a c program for finding the roots of the quadratic equation using conditional operator

Answer 1

double Root_1,Root_2;
int SolveQuadratic(double aa, double bb, double cc, double *x1, double *x2)
{
	double temp,t;
	int n;
	temp = (bb*bb) - (4*aa*cc);
	cout<<"\n";
	if(aa!=0)
	{
	
	if(temp<0)
	{
		t = -temp;
		t = sqrt(t);
		cout<<"\n Roots are Imaginary.";
		
		cout<<"\nRoot-1 = "<<(-bb/(2*aa))<<" + "<<(t/(2*aa));
		cout<<"\nRoot-1 = "<<(-bb/(2*aa))<<" - "<<(t/(2*aa));
		n = -1;
		*x1=0; *x2=0;
	}
	
	if(temp==0)
	{
		Root_1 = -bb/(2*aa);
		Root_2 = Root_1;	
		cout<<"\nRoots are real and Equal.";
		cout<<"\nRoots are "<<Root_1<<" and "<<Root_2;
		n=1;
		*x1=Root_1; *x2 = Root_2;
	}
	
	if(temp>0)
	{
		Root_1 = (-bb + sqrt(temp))/(2*aa);
		Root_2 = (-bb - sqrt(temp))/(2*aa);
		cout<<"\nRoots are real and Unequal.";
		cout<<"\nRoots are "<<Root_1<<" and "<<Root_2;
		n=2;
		*x1=Root_1; *x2 = Root_2;	
	}	
	}
	else
	{
		n = -2;
		*x1 = -cc/bb;
		*x2=0;
	}
	return(n);	
}




main(void)
{
	double a,b,c,x,y;
	int m;	
	cout<<"\nThe Quadratic Equation : a x^2 + bx + c";
	cout<<"\n\nEnter a = "; cin>>a;
	cout<<"\nEnter b = "; cin>>b;
	cout<<"\nEnter c = "; cin>>c;
	cout<<"\nThe Quadratic Equation : ("<<a<<") x^2 + ("<<b<<") x + "<<c;
	m = SolveQuadratic(a,b,c,&x,&y);
	cout<<"\n\nThe returned Int Value n = "<<m;
	cout<<"\n\n";
	if(m==0) cout<<"\n\nn = "<<m<<"\tNo Real Root";
	if(m==1) cout<<"\n\nn = "<<m<<"\tBoth roots are real and equal.";
	if(m==2) cout<<"\n\nn = "<<m<<"\tTwo Real roots.";
	if(m==-1) cout<<"\n\nn = "<<m<<"\tComplex Roots.";
	if(m==-2) cout<<"\n\nn = "<<m<<"\tLinear Equation.";
	
	return(0);	
}