import java.util.*;
public class UserCumulativeSum2{
   public static void main(String[] args){
      Scanner console = new Scanner(System.in);
      
      cummulativeSum1(console);
      cummulativeSum2(console);
      cummulativeSum3(console);
   }
   
   //this method finds the cummulative sum of values
   //the user enters (until the user enters -1)
   public static void cummulativeSum1(Scanner console){
      int sum = 0;
      
      //ask for the first value outside the loop
      System.out.print("Enter value (-1 to quit): ");
      int userValue = console.nextInt();
      
      while(userValue != -1){
         sum += userValue;
         System.out.print("Enter value (-1 to quit): ");
         userValue = console.nextInt();
      }
      
      System.out.println("Sum was: " + sum);
   }
   
   //this method finds the cummulative sum of values
   //the user enters (until the user enters -1)
   public static void cummulativeSum2(Scanner console){
      int sum = 0;
      
      int userValue = 98723549; // some number to get us in the loop
                                // this value will get replaced before 
                                // it gets added to the sum
      
      //loop until the user enters -1
      while(userValue != -1){
         System.out.print("Enter value (-1 to quit): ");
         userValue = console.nextInt();
         if(userValue != -1){
            sum += userValue;
         }
      }
      
      System.out.println("Sum was: " + sum);
   }
   
   //this method finds the cummulative sum of values
   //the user enters (until the user enters -1)
   public static void cummulativeSum3(Scanner console){
      int sum = 0;
      
      int userValue = 0; // a number that gets us in the loop
                        // and doesn't mess up the sum
           
      while(userValue != -1){
         sum += userValue;
         System.out.print("Enter value (-1 to quit): ");
         userValue = console.nextInt();
      }
      
      System.out.println("Sum was: " + sum);
   }
}