Question

Realizati un program in C# care sa rezolve ecuatia (a,b,c sunt citite de la tastatura) a+bx+c=0​

Answer 1

Răspuns:

#include <iostream>

#include <cmath>

using namespace std;

int main()

{

float a, b, c, x1, x2, delta, realPart, imaginaryPart;

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

cin >> a >> b >> c; delta = b*b - 4*a*c;

if (delta > 0)

{

x1 = (-b + sqrt(delta)) / (2*a);

x2 = (-b - sqrt(delta)) / (2*a);

cout << "Radacinile sunt reale si diferite." << endl;

cout << "x1 = " << x1 << endl;

cout << "x2 = " << x2 << endl;

}

else if (delta == 0)

{ cout << "Radacinile sunt reale dar aceasi." << endl;

x1 = -b/(2*a); cout << "x1 = x2 =" << x1 << endl;

}

else { realPart = -b/(2*a);

imaginaryPart =sqrt(-delta)/(2*a);

cout << "Radacinile sunt complexe si diferite" << endl;

cout << "x1 = " << realPart << "+" << imaginaryPart << "i" << endl;

cout << "x2 = " << realPart << "-" << imaginaryPart << "i" << endl;

}

return 0;

}

Explicație:

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

 

namespace ConsoleApp2

{

    class Program

    {

        public static void SolveQuadratic(double a, double b, double c)

 

        {

 

            double sqrtpart = b * b - 4 * a * c;

 

            double x, x1, x2, img;

 

            if (sqrtpart > 0)

 

            {

 

                x1 = (-b + System.Math.Sqrt(sqrtpart)) / (2 * a);

 

                x2 = (-b - System.Math.Sqrt(sqrtpart)) / (2 * a);

 

                Console.WriteLine("Two Real Solutions: {0,8:f4} or  {1,8:f4}", x1, x2);

            }

            else if (sqrtpart < 0)

            {

                sqrtpart = -sqrtpart;

                x = -b / (2 * a);

                img = System.Math.Sqrt(sqrtpart) / (2 * a);

                Console.WriteLine("Two Imaginary Solutions: {0,8:f4} + {1,8:f4} i or {2,8:f4} + {3,8:f4} i", x, img, x, img);

            }

            else

 

            {

                x = (-b + System.Math.Sqrt(sqrtpart)) / (2 * a);

                Console.