day4 - NumVowels in Java

day4/Java/NumVowels3.java

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+import java.util.Scanner;
+/*
+    Author: Grace Hudgens (Grace0Hud)
+    Date: 10/25/20
+    Problem: Day 4: Given a string, Write a program that prints the number of vowels in it.
+ */
+public class NumVowels3
+{
+    public static void main(String [] args)
+    {
+        System.out.println("----------NumVowels-----------");
+        System.out.println("Enter a String: ");
+        //user input
+        Scanner scan = new Scanner(System.in);
+        String input = scan.nextLine();
+        //output
+        System.out.println("It has "  + findNumVowels(input) + " vowels");
+
+
+        //general tests
+        /*
+        //expected output 2 - good
+        System.out.println(findNumVowels("hello"));
+        //expected 16 - good
+        System.out.println(findNumVowels("this is an interesting sentence. yes very interesting."));
+        //expected 18
+        System.out.println(findNumVowels("tHiS hAs cApital lEtters and not cApital letters. yUO get it?"));
+         */
+    }//end main method
+
+    public static int findNumVowels(String str)
+    {
+        int output = 0;
+        //turning the string into an array of characters
+        char[] strchar = str.toLowerCase().toCharArray();
+        //cycling through the array
+        for(int i = 0; i < str.length(); i++)
+        {
+            //adding to output if the char at i is a vowel
+            if(strchar[i] == 'a' || strchar[i] == 'e' || strchar[i] == 'i' || strchar[i] == 'o' || strchar[i] == 'u')
+                output++;
+        }//end for loop
+        return output;
+    }//end findNumVowels method
+}//end class NumVowels3

day7/Java/OneEditAway2.java

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+import java.util.Scanner;
+//One Edit Away
+/*
+    Author: Grace Hudgens (Grace0Hud)
+    Date: 10/25/20
+
+
+    Problem: Day 7 -
+        Given two strings, check whether they are one edit distance apart,
+        i.e., if str1 and str2 are the given strings,
+        check whether str1 can be converted to str2 with exactly one edit.
+    An edit between 2 strings is one of the following operations
+        - Replace a character
+        - Add a character
+        - Delete a character
+        - The strings are the same
+ */
+public class OneEditAway
+{
+    public static void main(String [] args)
+    {
+        Scanner scan = new Scanner(System.in);
+        System.out.println("------ One Edit Away -------");
+        System.out.println("1st String: ");
+        String str1 = scan.nextLine();
+        System.out.println("2nd String: ");
+        String str2 = scan.nextLine();
+        System.out.println("These strings are one edit away: "  + isOneEditAway(str1,str2));
+        //testing of algorithm
+        /*
+        //expected true - success
+        System.out.println(isOneEditAway("is", "isa"));
+        //expected true - success
+        System.out.println(isOneEditAway("is", "is"));
+        //expected false - success
+        System.out.println(isOneEditAway("is", "isac"));
+        //expected true - success
+        System.out.println(isOneEditAway("Grace", "Grice"));
+        //expected false - success
+        System.out.println(isOneEditAway("thisisastring", "thisisoneisa"));
+
+         */
+    }//end main method
+
+    public static boolean isOneEditAway(String str1, String str2)
+    {
+        boolean output = false;
+        //first checks if the strings equal each other
+        if(str1.equals(str2))
+        {
+          output = true;
+        }else if(str1.length() == str2.length() || Math.abs(str1.length() - str2.length() )== 1)
+        {
+            //then check how much of a difference there is between them.
+            //if its only one letter difference then true
+
+            //used to keep track of the amt of letters that are different
+            int diff = 0;
+            //strings to char arrays
+            char[] smallest;
+            char[] largest;
+            //decides which string is longer and adds to diff;
+            //if strings are the same size it does not add to diff
+            if(str1.length() < str2.length())
+            {
+                smallest = str1.toCharArray();
+                largest = str2.toCharArray();
+                diff++;
+            }else if(str1.length() > str2.length())
+            {
+                smallest = str2.toCharArray();
+                largest = str1.toCharArray();
+                diff++;
+            }else
+            {
+                smallest = str1.toCharArray();
+                largest = str2.toCharArray();
+            }//end if
+
+            //for loop that cycles through both arrays
+            //if one of the letters does not equal the other, it adds to diff
+            for(int i = 0; i < smallest.length; i++)
+            {
+                if(smallest[i] != largest[i])
+                {
+                    diff++;
+                }//end inner if
+            }//end for loop
+
+            if(diff  == 1)
+            {
+                output = true;
+            }//end if changing output value
+        }//end else if
+        return output;
+    }//end isoneeditaway method
+}//end of OneEditAway class