سورس برنامه ی حل معادله ی درجه دوم با گرفتن a و b و c:

#include "stdafx.h"

#include <iostream.h>

#include <math.h>

void main()

{

    int a, b, c;

    int delta;

    cout<<"Please enter a, b, c as this structure: ax^2+bx+c=0"<<endl;

    cin>>a>>b>>c;

    delta = (b*b)-(4*a*c);

    if(delta == 0)

    {

        cout<<"The only answer:\n"<<"x= "<<(-b)/(2*a);

    }

    else if(delta > 0)

    {

        cout<<"Two answers:\n"<<"x1= "<<((-b)+sqrt(delta))/(2*a);

        cout<<"\tx2= "<<((-b)-sqrt(delta))/(2*a);

    }

cin.get();

cin.get();

}

}