android - How to regularly update an an integer -


so have string[] contains math expressions "3+6=" or "5+9/8=". have function gets array, loops through array , while looping, splits array have 1 string[] containing math operations +,-,*,/ , int[] containing numbers in question.

the function puts the answer int[] called answers. question why when output answers[0], can see first number , not answer first question?

edit = have found out problem happening. happening in evaluation method. dont know why:

public int evaluateanswertwooperations(string operation, int numberone, int numbertwo) {      switch(operation){          case "+":             log.d("usingsubtraction","plus2nmbers");             return numberone + numbertwo;         case "-":             log.d("usingsubtraction","usingsubtraction");             return  numberone - numbertwo;         case "/":             log.d("usingsubtraction","usingdivision");             return numberone / numbertwo;         default:             log.d("usingsubtraction","usingmultiplication");             return numberone*numbertwo;      }

something this:

import android.util.log;  public class twonumberoperation {      private final string plus = "+";     private final string minus = "-";     private final string multiply = "*";     private final string divide = "/";     private final string equal = "=";      private string operation;     private int numberone;     private int numbertwo;      public twonumberoperation(string operation, int numberone, int numbertwo) {         if (operation.equalsignorecase(plus) ||                 operation.equalsignorecase(minus) ||                 operation.equalsignorecase(multiply) ||                 operation.equalsignorecase(divide)) {              this.operation = operation;             this.numberone = numberone;             this.numbertwo = numbertwo;         }         else {             log.d("error", "error: invalid operation");             this.operation = "";             this.numberone = 0;             this.numbertwo = 0;         }     }      public int getanswer() {          switch (operation) {              case plus:                 log.d("addition", "addition");                 return numberone + numbertwo;             case minus:                 log.d("subtraction", "subtraction");                 return numberone - numbertwo;             case multiply:                 log.d("multiplication", "multiplication");                 return numberone / numbertwo;             case divide:                 log.d("division", "division");                 return numberone / numbertwo; // note returning int             default:                 log.d("error", "error");                 return -999999999;         }     }      @override     public string tostring() {         return numberone + operation + numbertwo + equal;     }  }

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