#include <stdio.h>
#include <math.h>

int main()
{
	float a, b, c, d;
	float root1, root2;

	while (1)
	{
		printf("Enter the coefficients of a quadratic equation:\n");

		do {
			printf("ax^2 + bx + c = 0 --> ");
			scanf("%f %f %f", &a, &b, &c);
		} while (a == 0);

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

		if (d < 0)
			printf("No real root\n\n");
		else if (d == 0)
		{
			root1 = -b / (2 * a);
			printf("Equal roots\n");
			printf("Root = %.2f\n\n", root1);
		}			
		else
		{
			root1 = (-b + sqrt(d)) / (2 * a);
			root2 = (-b - sqrt(d)) / (2 * a);
			printf("Two real roots\n");
			printf("Root 1 = %.2f\n", root1);
			printf("Root 2 = %.2f\n\n", root2);
		}
	}

	return 0;
}