Make a Program About Quadratic Equation.Now We make C++ Program to Find All Roots of a Quadratic Equation.
C++ Program to Find All Roots of a Quadratic Equation
#include<iostream> #include<math.h> using namespace std; int main() { float root1,root2,a,b,c,d,imaginaryPart,realPart; cout<<"Quadratic Equation is ax^2+bx+c=0"; cout<<"\nEnter values of a,b and c:"; cin>>a>>b>>c; d=(b*b)-(4*a*c); if(d>0) { cout<<"\nTwo real and distinct roots"; root1=(-b+sqrt(d))/(2*a); root2=(-b-sqrt(d))/(2*a); cout<<"\nRoots are "<<root1<<" and "<<root2; } else if(d==0) { cout<<"\nTwo real and equal roots"; root1=root2=-b/(2*a); cout<<"\nRoots are "<<root1<<" and "<<root2; } else{ cout<<"\nRoots are complex and imaginary"; realPart = -b/(2*a); imaginaryPart = sqrt(-d)/(2*a); cout<<"\nRoots are "<<realPart<<"+"<<imaginaryPart<<"i and "<<realPart<<"-"<<imaginaryPart<<"i"; } return 0; }
Out put of program
Enter coefficients a, b and c: 4
5
1
Roots are real and different.
x1 = -0.25
x2 = -1
Quadratic Equation is ax^2+bx+c=0
Enter values of a,b and c:3
4
1
Two real and distinct roots
Roots are -0.333333 and -1