Solution to Java Quiz Dec 4, 2008

1. Part A.
k
son
tored
6
1
2
2

1. Part B

This counts the number of strings in manyStrings that have the word cat
in them.

2.  public String extract(String dna)
    {
       String answer = "";    // new string to build
       for (char ch: dna.toCharArray())
       {
          if ((ch == 'a') || (ch == 'g'))
          {
             answer = answer + ch;  // append ch to right end of string
          }
       }
       return answer;   
    }
    
3.  // return the number of strings of length > num
    public int NumberLargeEnough (String [] words, int num)
    {
       int count = 0;
       for (String item: words)  
       {
          if (item.length() > num)
          {
             count ++;
          }
       }
       return count;
    }
        
4.  public double average (int [] values)
    {
       double sum = 0;
       double count = 0;
       for (int someNum: values)
       {
          sum = sum + someNum;
          count = count + 1;
       }
       return sum/count;
    }