#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <math.h>
#include <windows.h>
#define OUTPUTFILE "D:\\Bolshakov41p\\Processes\\Files\\Output.txt"

int main(int argc, char* argv[])
{
	system("chcp 1251>nul");
	HANDLE OutputFile = CreateFileA(OUTPUTFILE,
		GENERIC_WRITE,
		0,
		NULL,
		CREATE_ALWAYS,
		FILE_ATTRIBUTE_NORMAL,
		NULL);

	double a = atof(argv[0]);
	double b = atof(argv[1]);
	double c = atof(argv[2]);

	DWORD numBytesRead;
	double D;
	double x1;
	double x2;
	char output[100];
	int countRoots;


	if (a == 0)
	{
		sprintf(output, "Не квадратное уравнение");
		WriteFile(OutputFile, output, strlen(output), &numBytesRead, NULL);

	}

	else
	{
		D = pow(b, 2) - 4 * a * c;
	}

	if (D < 0)
	{
		printf("Уравнение не имеет решения");
		sprintf(output, "Уравнение не имеет решения");
		WriteFile(OutputFile, output, strlen(output), &numBytesRead, NULL);
		countRoots = 0;
	}
	else if (D == 0)
	{
		x1 = (-b) / (2 * a);
		printf("Дискримминант: %.2lf\n", D);
		printf("x1 = %.2lf", x1);

		sprintf(output, "Дискримминант: %.2lf\n", D);
		WriteFile(OutputFile, output, strlen(output), &numBytesRead, NULL);
		sprintf(output, "x1 = %.2lf", x1);
		WriteFile(OutputFile, output, strlen(output), &numBytesRead, NULL);
		countRoots = 1;
	}
	else
	{
		x1 = (-b + sqrt(D)) / (2 * a);
		x2 = (-b - sqrt(D)) / (2 * a);
		printf("Дискримминант: %.2lf\n", D);
		printf("x1 = %.2lf, x2 = %.2lf\n", x1, x2);

		sprintf(output, "Дискримминант: %.2lf\n", D);
		WriteFile(OutputFile, output, strlen(output), &numBytesRead, NULL);

		sprintf(output, "x1 = %.2lf, x2 = %.2lf\n", x1, x2);
		WriteFile(OutputFile, output, strlen(output), &numBytesRead, NULL);
		countRoots = 2;

	}
	CloseHandle(OutputFile);
	return countRoots;

}