Created a C++ Program to Find All Roots of a Quadratic Equation

This program accepts coefficients of a quadratic equation from the user and displays the roots (both real and complex roots depending upon the discriminant).

Author: TanmoyMahanty

C++/Quadratic Equation.cpp

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+#include <iostream>
+#include <cmath>
+using namespace std;
+
+int main() {
+
+    float a, b, c, x1, x2, discriminant, realPart, imaginaryPart;
+    cout << "Enter coefficients a, b and c: ";
+    cin >> a >> b >> c;
+    discriminant = b*b - 4*a*c;
+    
+    if (discriminant > 0) {
+        x1 = (-b + sqrt(discriminant)) / (2*a);
+        x2 = (-b - sqrt(discriminant)) / (2*a);
+        cout << "Roots are real and different." << endl;
+        cout << "x1 = " << x1 << endl;
+        cout << "x2 = " << x2 << endl;
+    }
+    
+    else if (discriminant == 0) {
+        cout << "Roots are real and same." << endl;
+        x1 = -b/(2*a);
+        cout << "x1 = x2 =" << x1 << endl;
+    }
+
+    else {
+        realPart = -b/(2*a);
+        imaginaryPart =sqrt(-discriminant)/(2*a);
+        cout << "Roots are complex and different."  << endl;
+        cout << "x1 = " << realPart << "+" << imaginaryPart << "i" << endl;
+        cout << "x2 = " << realPart << "-" << imaginaryPart << "i" << endl;
+    }
+
+    return 0;
+}