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


int a,b,c;
float d,x1r,x2r,x1u,x2u;

int main(){

	printf("Podaj a\n");
	scanf_s("%d",&a);
	printf("Podaj b\n");
	scanf_s("%d",&b);
	printf("Podaj c\n");
	scanf_s("%d",&c);
	system("cls");
	printf("Wzor: ");

	if((a>0)&&(a!=1)){
	printf("%dxx",a);
	}
	if(a==1){
	printf("xx");
	}
	if((a<0)&&(a!=-1)){
	printf("%dxx",a);
	}
	if(a==-1){
	printf("-xx");
	}

	if((a!=0)&&(b>0)&&(b!=1)){
	printf("+%dx",b);
	}
	if((a==0)&&(b>0)&&(b!=1)){
	printf("%dx",b);
	}
	if((b==1)&&(a!=0)){
	printf("+x");
	}
	if((b==1)&&(a==0)){
	printf("x");
	}
	if((b<0)&&(b!=-1)){
	printf("%dx",b);
	}
	if(b==-1){
	printf("-x");
	}

	if(((a!=0)||(b!=0))&&(c!=0)&&(c>0)){
	printf("+%d",c);
	}
	if((a==0)&&(b==0)&&(c!=0)&&(c>0)){
	printf("%d",c);
	}
	if(c<0){
	printf("%d",c);
	}
	if((a==0)&&(b==0)&&(c==0)){
	printf("%d",c);
	}
	printf("=0\n");

	if((a==0)&&(b!=0)){
	x1r=(float)-c/b;
	printf("\nx1 =%f",x1r);
	system("pause");
	}

	if((a==0)&&(b==0)&&(c!=0)){
		printf("Rownanie sprzeczne");
		system("pause");
	}
	if((a==0)&&(b==0)&&(c==0)){
		printf("rownanie tozsamosciowe");
		system("pause");
	}

	if(a!=0){
	d=b*b-4*a*c;
	}

	if(d>0){
		x1r=(-b-sqrt(d))/(2*a);
		x2r=(-b+sqrt(d))/(2*a);
		printf("x1=%f\n",x1r);
		printf("x2=%f\n",x2r);
		system("pause");
	}
	if(d==0){
		x1r=(float)-b/(2*a);
		printf("x1=%f\n",x1r);
		system("pause");
	}
	if(d<0){
		x1r=(float)-b/(2*a);
		x2r=x1r;
		x1u=-(sqrt(abs(d)))/(2*a);
		x2u=-x1u;
		if(x1u<0){
		printf("\n%f%f*i\n",x1r,x1u);
		}
		else
		{
			printf("\n%f+%f*i\n",x1r,x1u);
		}
		if(x2u<0){
		printf("%f%f*i\n",x2r,x2u);
		}
		else
		{
			printf("%f+%f*i\n",x2r,x2u);
		}
	}

	system("pause");
}