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Need help for C++ programming

Hi,
I am back again with another problem. Hope someone can help. I can get the program to run, but I cannot figure out how to end the program when sales < than 0 for each section.

The problem is this:

Create a program that displays the sum of the sales amounts made in each of four regtions (North, East, South, and West) during a 3 month period. The program also should display the total sales made during the three months. The C++ code should allow the user to enter 4 sets (one set for each region) of 3 sales amounts (one sales amount for each month). The program should display each region's total sales for the 3-month period, and the company's total sales for the 3-month period.
Use the following four sets of data to test the program:
2000, 4000, 3000
2000, 5000, 5000
3000, 2000, 1000
4000, 1000, 6000

Here is my program so far:

Code:

 

#include <iostream>

using std::cout;

using std::cin;

using std::endl;

 

int main()

{



 //declare variables

 int northRegionSales = 0;

 int totalNorthSales = 0;

 int northRegion = 1;

 int eastRegionSales = 0;

 int totalEastSales = 0;

 int eastRegion = 1;

 int southRegionSales = 0;

 int totalSouthSales = 0;

 int southRegion = 1;

 int westRegionSales = 0;

 int totalWestSales = 0;

 int westRegion = 1;

 int totalSales = 0;

 

 //enter sales amounts for North region

 cout << "Sales amount for North region (negative number to stop): $ ";

 cin >> northRegionSales;

 do

 {

  northRegion += 1;

  totalNorthSales = totalNorthSales + northRegionSales;

  cout << "Next sales amount for North region (negative number to stop): $ ";

  cin >> northRegionSales;

 } while (northRegion <= 2); 

 cout << endl;

 totalNorthSales = totalNorthSales + northRegionSales;

 

  //enter sales amounts for East region

  cout << "Sales amount for East region (negative number to stop): $ ";

  cin >> eastRegionSales;

   do

   {

    eastRegion += 1;

    totalEastSales = totalEastSales + eastRegionSales;

    cout << "Next sales amount for East region (negative number to stop): $ ";

    cin >> eastRegionSales;

   } while (eastRegion <= 2);

   cout << endl;

   totalEastSales = totalEastSales + eastRegionSales;



  //enter sales amounts for South region

  cout << "Sales amount for South region (negative number to stop): $ ";

  cin >> southRegionSales;

   do

   {

    southRegion += 1;

    totalSouthSales = totalSouthSales + southRegionSales;

    cout << "Next sales amount for South region (negative number to stop): $ ";

    cin >> southRegionSales;

   } while (southRegion <= 2);

  cout << endl;

  totalSouthSales = totalSouthSales + southRegionSales;

 

  //enter sales amounts for West region

  cout << "Sales amount for West region (negative number to stop): $ ";

  cin >> westRegionSales;

   do

   {

    westRegion += 1;

    totalWestSales = totalWestSales + westRegionSales;

    cout << "Next sales amount for South region (negative number to stop): $ ";

    cin >> westRegionSales;

   } while (westRegion <= 2);

  cout << endl;

  totalWestSales = totalWestSales + westRegionSales;

 // end do while

 

  //display total sales for each region

  cout << "Total sales for North region: $ " << totalNorthSales << endl;

  cout << "Total sales for East region: $ " << totalEastSales << endl;

  cout << "Total sales for South region: $ " << totalSouthSales << endl;

  cout << "Total sales for West region: $ " << totalWestSales << endl;

  totalSales = totalNorthSales + totalEastSales + totalSouthSales + totalWestSales;

  cout << "Total sales: $ " << totalSales << endl;

  return 0;

}   //end of main function

Thank u for your help! :cryin: