QUADRATIC EQUATIONS CALCULATOR

quadraticequation.cpp

#include <iostream>
#include <math.h>
#include <iostream>
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <time.h>
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
void progressbar(){
	cout<<"\t\t\t\t    ";
/*Loading bar*/
for(int i=0; i<100/5; i++){
			cout<<(char)177;
			}
			cout<<"<<\r\t\t\t\t";
				for(int i = 0; i<=100; i++){
        cout << "\r\t\t  "   << i << "% completed   >>" ;
       for (int o=1;o<i/5;o++){
    cout<<(char)219;
             }
                   switch (i% 4)
            {
                case 0: cout<<"\r\t\t/"; break;
                case 1: cout<<"\r\t\t-"; break;
                case 2: cout<<"\r\t\t\\"; break;
                case 3: cout<<"\r\t\t-"; break;
            }
    Sleep(50);
         }
          cout<<endl;
}
int main(int argc, char** argv) {
	
float x,a,b,c,d,d2;
char again;
do{

cout<<"\t ~WELCOME TO THE QUADRATIC EQUATIONS CALCULATOR~\n";
cout<<"\t   -a(if you dont have a value type '0'): ";
cin>>a;
//tester
if(cin.fail()){
	    cin.clear();
	        cin.ignore(10, '\n');


cout<<"\t -Its  Not a number\n\t -Please write it again\n";
cout<<"\t -Please write a positive or negative value(it must be a number):";
cin>>a;
if(cin.fail()){
cout<<"\n\n\n\t -Please next time try to write a number...";
break;

}

}
//tester

cout<<"\t   -b(if you dont have a value type '0'): ";
cin>>b;
//tester
if(cin.fail()){
	    cin.clear();
	        cin.ignore(10, '\n');


cout<<"\t -Its  Not a number\n\t -Please write it again\n";
cout<<"\t -Please write a positive or negative value(it must be a number):";
cin>>b;
if(cin.fail()){
cout<<"\n\n\n\t -Please next time try to write a number...";
break;

}

}
//tester
cout<<"\t   -c(if you dont have a value type '0'): ";
cin>>c;
//tester
if(cin.fail()){
	    cin.clear();
	        cin.ignore(10, '\n');


cout<<"\t -Its  Not a number\n\t -Please write it again\n";
cout<<"\t -Please write a positive or negative value(it must be a number):";
cin>>c;
if(cin.fail()){
cout<<"\n\n\n\t -Please next time try to write a number...";
break;

}

}
//tester

if (a==0){


	if (b==0){
		if(c==0){
			cout<<"\t\t- all values are 0\n\t\t- please write any value ";
	}
		else
		cout<<"\t\t- b and a are 0\n\t\t- no answer ";
}
		
	else
	cout<<"\t\t- a is 0\n\t\t- x  =  "<<-c/b;
	}
else {
	cout<<"\t -we are creating your discriminant please wait. :) \n";
progressbar();
d=(b*b-4*a*c);
if (d<0){
	cout<<"\t-discriminant is smaller then 0\n\t\t- no result ";
}
else if(d>0){
		cout<<"\t\t-discriminant is bigger then 0\n\t\t- x  = "<<(-b+sqrt(d))/(2*a)<<endl<<"\t\t- x2 = "<<(-b-sqrt(d))/(2*a);

}
		else if(d==0)
		cout<<"\t\t-discriminant is equal to 0\n\t\t- x  = "<<-b/(2*a);
	}
	
	cout<<"\n\t\t ~Do you wanna continue?[Y/N]~";
	cin>>again;
	
}while(again=='y'||again=='Y');
	return 0;
}