C++ if else and logical operators (con.)

C++ if else and logical operators (con.)

Write a C++ program to compute the real roots of the equation: ax 2 +bx+c=0. The program will prompt the user to input the values of a, b,... 10:29 AM

Write a C++ program to compute the real roots of the equation: ax²+bx+c=0.

The program will prompt the user to input the values of a, b, and c. It then computes the real roots of the equation based on the following rules: 
-if a and b are zero=> no solution 
-if a is zero=>one root (-c/b) 
-if b2-4ac is negative=>no roots 
-Otherwise=> two roots 
The roots can be computed using the following formula: 
x1=-b+(b²-4ac)^1/2/2a 
x=-b-(b²-4ac)^1/2/2a

Solution:

#include <cstdlib> 
#include <iostream> 
#include<iomanip> 
#include<cmath> 
  
using namespace std; 
int main(int argc, char *argv[]) 
{ 
   float a; 
   float b; 
   float c; 
   float delta; 
   cout<<"Enter values of a b c separated by space:"; 
   cin>>a>>b>>c; 
   if(a==0 && b==0)cout<<"No root"; 
   else if(a==0)cout<<"The equation has only one root:"<<-b/c; 
   else { 
        delta=b*b-4*a*c; 
        if(delta<0) cout<<"No root"; 
        else cout<<"The equation has two roots:"<<"x="<<-b+sqrt(b*b-4*a*c)/(2*a)<<",x1="<<-b-sqrt(b*b-4*a*c)/(2*a); 
        }               
      cout<<"\n"; 
   system("PAUSE"); 
   return EXIT_SUCCESS; 
}