//Bad programming, INITIALIZE.
#include<iostream>
#include <math.h>
using std::cout;
using std::cin;

	void forberedelse();
	void inmatning();
	void utrakning();
	
   	char forsta;
   	char andra;
   	float A;
	float B;
	float C;
	float X;
	float Y;
	float iY;
	float X1;
	float X2;

void inmatning(){
	cout << "Lösning av andragradsekvation av typen AX²±BX±C\nAX²?\n";
	cin >> A;
	cout << A << "X²±?\n";
	cin >> forsta;
	cout << A << "X²" << forsta << "BX?\n";
	cin >> B;
	cout << "X²" << forsta << B <<"X±?\n";
    	cin >> andra;
    	cout << "X²" << forsta << B << "X" << andra << "C?\n";
    	cin >> C;
    	cout << "Lösning av följande ekvation:\n" << A << "X²" << forsta << B << "X" << andra << C << "\n\n"; 
	return;
}

void forberedelse(){
	if (A != 1){
		
		B = (B/A);
		C = (C/A);
		A = (A/A);
	}
	
	if (((B/2)*(B/2)) < C && andra == '+') {
		X = (B/2);
		X = (X*(1*(forsta == '+' ? -1 : 1 )));
		Y = (X*X+(C*(andra == '+' ? -1 : 1)));
		iY = Y*(-1);
		Y = sqrt(iY);
		cout << X <<"±"<< "i" << Y << "\n";
		return;
	}
	utrakning();
}

void utrakning(){
	X = (B/2);
	X = (X*(1*(forsta == '+' ? -1 : 1 )));
	Y = sqrt(X*X+(C*(andra == '+' ? -1 : 1)));
	X1 = X+Y;
	X2 = X-Y;
	cout << X <<"±"<< Y << "\n" << "X1: " << X1 << "\n" << "X2: " << X2 << "\n";
	return;
}

int main(){
    inmatning();
    forberedelse();
    return 0;
}