Algebra program problem

[Besm Osman]

hello,

I am making a program where you input two numbers and outputs two numbers which
are combined number1 and timed number two

for example
input: 7 12
output:3 4

the problem is when your iput is a positive and then a negative

for example
input: 7 -12

you get no answer. this is the only combination that doesn't work.
-- -+ ++ works.

can somewone plz tell me whats wrong with the code
and sorry if the code is sloppy i am a beginner.

#include "stdafx.h"
#include <iostream>
using namespace std;


int main()
{
	while(true)
	{
	bool loop=true;
	
	int n1;
	int n2;
	cin >> n1 >> n2;
	int n3=-100;
	int n4=-100;
		
	
	for(bool loop=true;loop=true; n3++)
	{
		
			
		for(; n4<30; n4++)
			{
				if(n3+n4==n1 && n3*n4==n2)
				{
				const char* plusSignN3 = "";
				const char* plusSignN4 = "";

					if(n3>0)
					{
						plusSignN3="+";	
					}

					if(n3>0)
					{
						plusSignN4="+";	
					}
				
					cout << n3 << " " << n4 << endl;

					loop=false;
			

				}	
			}
			n4=0;	
	
}
	cin >> n1;
	}
}

[Bourgond Aries]

I think you need better checks. I believe this program tries to find two numbers of which the sum equals the first number and the product equals the second number. I have tried to make it so that if there is no solution, we get back to input.

#include <iostream>

int main()
{
    using namespace std;
    while(true)
    {
        int n1(0), n2(0);
        cin >> n1 >> n2;
        int n3(-100), n4(-100);


        for(bool loop = true; (n3 < n1 || n3 < n2) && loop; ++n3) // You used assignment, you should use == to check for equality.
        {
            for(; n4 < n1 || n4 < n2; ++n4)
            {
                if((n3 + n4) == n1 && (n3 * n4) == n2) // http://en.cppreference.com/w/cpp/language/operator_precedence
                {
                    const char *plusSignN3 = "";
                    const char *plusSignN4 = "";

                    if(n3 > 0)
                    {
                        plusSignN3 = "+";
                        plusSignN4 = "+";
                    }
                    cout << n3 << " " << n4 << endl;
                    loop = false;
                    break;
                }
            }
            n4=0;
        }
        //cin >> n1; // Why are you asking for n1 when you're gonna ask it again?
    }
}