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#751399 ·published 2007-10-27 10:56 UTC
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/* rovnice.c */

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

int main(void) {
	int a, b, c, d;
	double x, y, z;

	printf("Zadejte koeficienty a, b, c kvadraticke rovnice: \n");
	scanf("%d%d%d", &a, &b, &c);

	d = b*b - 4*a*c;
	z = sqrt((double)d);

	if (d < 0)
		printf("Rovnice nema v oboru realnych cisel reseni.\n");
	else if (d == 0)
	{
		x = ((-b)/2*a);
		printf("Resenim rovnice je dvojnasobny koren x = %d\n", x);
	}
	else
	{
		x = (-b+z)/2*a;
		y = (-b-z)/2*a;
		printf("Resenim rovnice jsou dva koreny x1 = %d a x2 = %d\n", x, y);
	}

	return 0;
}