• List of C++ Programs
• List of All Programs

Write C++ Program to Find Roots of Quadratic Equation

// CPP Program to Find Roots of Quadratic Equation

#include <iostream>
#include <math.h>

using namespace std;

int main()
{
    float a, b, c, delta, root1, root2;
    cout << "Enter Coefficient a :--> ";
    cin >> a;

    cout << "Enter Coefficient b :--> ";
    cin >> b;

    cout << "Enter Coefficient c :--> ";
    cin >> c;

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

    root1 = (-b + sqrt(delta)) / (2 * a);
    root2 = (-b - sqrt(delta)) / (2 * a);
    cout << "\nRoot 1 = " << root1;
    cout << "\nRoot 2 = " << root2;

	return 0;
}

Output:

Enter Coefficient a :--> 4
Enter Coefficient b :--> 8
Enter Coefficient c :--> 2

Root 1 = -0.29
Root 2 = -1.71