Thread: warning c4700

Code:

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

void input_rect(double,double);
double const pi = atan(1.0);

int main()
{

	int choice;
	double ReA, ImA;
	do 
	{
		cout << "Complex number A: Real: " << ReA << " Imaginary: " << ImA << endl << endl;
		cout << "1. Enter Complex Number A in Rectangular Form \n";
		cout << "2. Enter Complex Number A in Polar Form \n"; 
		cout << "3. Enter Complex Number B in Rectangular Form \n"; 
		cout << "4. Enter Complex Number B in Polar Form  \n"; 
		cout << "5. Add the two Complex Numbers: C = A + B \n"; 
		cout << "6. Find the Complex Conjugate: C = A* \n"; 
		cout << "7. Multiply the two Complex Numbers: C = AB \n"; 
		cout << "8. Divide the two Complex Numbers:  C = A / B \n"; 
		cout << "9. Quit \n \n"; 
		cout << "make a selection: ";
		cin >> choice;
		
		switch (choice)
		{
			case 1: cout << "chose 1 \n \n";
			{
				input_rect(ReA,ImA);
				break;
			}
			case 2: cout << "chose 2 \n" << endl; break;
			case 3: cout << "chose 3 \n" << endl; break;
			case 4: cout << "chose 4 \n" << endl; break;
			case 5: cout << "chose 5 \n" << endl; break;
			case 6: cout << "chose 6 \n" << endl; break;
			case 7: cout << "chose 7 \n" << endl; break;
			case 8: cout << "chose 8 \n" << endl; break;
		}
	}
	while (choice !=9);
	system ("pause");    
	return 0;
}
void input_rect(double Real, double Imag)
{
	cout << "Enter real part: ";
	cin >> Real;
	cout << "Enter Imaginary part: ";
	cin >> Imag;
	cout << endl;
}

what does it mean by it's uninitialized?

When I assign it values, they stay that value when i need it to change