86 lines
2.6 KiB
C#
86 lines
2.6 KiB
C#
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/*
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* C# Program to Find Roots of a Quadratic Equation
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*/
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using System;
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namespace example
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{
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class Quadraticroots
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{
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double a, b, c;
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public void read()
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{
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Console.WriteLine(" \n To find the roots of a quadratic equation of the form a*x*x + b*x + c = 0");
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Console.Write("\n Enter value for a : ");
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a = double.Parse(Console.ReadLine());
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Console.Write("\n Enter value for b : ");
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b = double.Parse(Console.ReadLine());
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Console.Write("\n Enter value for c : ");
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c = double.Parse(Console.ReadLine());
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}
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public void compute()
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{
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int m;
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double r1, r2, d1;
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d1 = b * b - 4 * a * c;
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if (a == 0)
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m = 1;
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else if (d1 > 0)
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m = 2;
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else if (d1 == 0)
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m = 3;
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else
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m = 4;
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switch (m)
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{
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case 1:
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Console.WriteLine("\n Not a Quadratic equation, Linear equation");
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Console.ReadLine();
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break;
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case 2:
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Console.WriteLine("\n Roots are Real and Distinct");
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r1 = (-b + Math.Sqrt(d1)) / (2 * a);
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r2 = (-b - Math.Sqrt(d1)) / (2 * a);
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Console.WriteLine("\n First root is {0:#.##}", r1);
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Console.WriteLine("\n Second root is {0:#.##}", r2);
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Console.ReadLine();
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break;
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case 3:
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Console.WriteLine("\n Roots are Real and Equal");
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r1 = r2 = (-b) / (2 * a);
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Console.WriteLine("\n First root is {0:#.##}", r1);
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Console.WriteLine("\n Second root is {0:#.##}", r2);
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Console.ReadLine();
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break;
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case 4:
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Console.WriteLine("\n Roots are Imaginary");
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r1 = (-b) / (2 * a);
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r2 = Math.Sqrt(-d1) / (2 * a);
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Console.WriteLine("\n First root is {0:#.##} + i {1:#.##}", r1, r2);
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Console.WriteLine("\n Second root is {0:#.##} - i {1:#.##}", r1, r2);
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Console.ReadLine();
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break;
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}
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}
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}
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class Roots
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{
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public static void Main()
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{
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Quadraticroots qr = new Quadraticroots();
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qr.read();
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qr.compute();
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}
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}
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}
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/*
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To find the roots of a quadratic equation of the form a*x*x + b*x + c = 0
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Enter value for a : 3.5
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Enter value for b : 2.5
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Enter value for c : 1.0
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Roots are Imaginary
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First root is -.36 + i .4
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Second root is -.36 - i .4
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