title: Output displayed automatically without doing anything
body: <p>So , I am trying to create a program which calculates the score of an exam . What we have to do is give a pattern as a string consisting X's and 0's i.e 000XXX000XXX, where the value of 'X' is 0 and the value of each zero is 1 and for every consecutive '0' the value increases by 1 . If suppose there are 2 or more consecutive 0's and then an 'X' the value of '0' is reset to 1.if the program seems common to you , then , yes this is a problem from an OJ and it was given to me by a senior from my university to solve.Now the thing is I have figured out how the code works and solved the problem.But there seems to be an issue in the code. </p>
  
  <pre><code>package javaapplication4;
  
  import java.util.Scanner;
  
  public class JavaApplication4 {
  
  public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      int T, score = 0, f = 0, g = 0;
      String str;
      int len;
      T = sc.nextInt();
  
      for (int i = 1; i &lt;= T; i++) {
          str = sc.nextLine();
          len = str.length();
  
          for (int j = 0; j &lt; len; j++) {
              if (str.charAt(j) == '0') {
                  f++;
                  score = score + f;
  
              }
              else if(str.charAt(j) == 'X')
              {
                  f = 0;
                  score = score + g;
              }
          }
  
          System.out.println(score);
  
      }
  }
  
  }
  </code></pre>
  
  <p>As you can see from the code , I first give an Input for the number of test cases and as soon as I press enter , the code displays the value of score (which is 0) automatically without doing any think inside the for loop.
  I have rechecked all the curly braces, but I cannot find the bug in the code. I would be happy if I could get some help. </p>
  
  <pre><code>Output:
  4
  0
  </code></pre>