Please correct the program: #include <iostream> #include <cmath> using namespace

Question

Please correct the program:

#include <iostream>

#include <cmath>

using namespace std;

int main()

{

float a, b, c;

cout << "Enter coefficients a, b and c: ";

cin >> a >> b >> c;

bool complex;

complex = false;

float x = 0; // x = -b/(2a)

float y = 0; // y = sqrt(radicand)/(2a)

float radicand;

if (a = !0) {

radicand = b * b - 4 * a * c;

}

if (radicand < 0) {

complex = true;

radicand = -radicand;

}

else if (b = !0) {

x = -c / b;

}

else if (a = 0 && b = !0) {

b * z + c = 0;

}

cout << "z = " << x << " + i " << fabs(y) << endl;

cout << "z = " << x << " - i " << fabs(y) << endl;

cout << "z = " << x + y << endl;

cout << "z = " << x - y << endl;

return 0;

}

Explanation / Answer

#include <iostream>
#include<cmath>

using namespace std;

int main() {
float a,b,c,d,root1,root2; // Declaring coefficients and roots
cin>>a>>b>>c; // Taking coefficients as input
if(a==0)
{
if(b==0)
{
if(c==0)
{
cout<<"All numbers are root";
}
}
else
{
cout<<"This is a linear equation"<<"root="<<-c/b;
}
}
else
{
d=b*b-4.0*a*c;
if(d>0.0)
{
d=sqrt(d);
root1=(-b+d)/(2.0*a);
root2=(-b-d)/(2.0*a);
cout<<"Roots are"<<root1<<"and"<<root2;
}
else if(d==0.0)
{
cout<<"Repeated root is",-b/2.0*a;
}
else
{
cout<<"There is no real root";
cout<<"Discriminant is"<<d;
}
}

}

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