讲解Lab 10、辅导Recursive Functions、讲解Java编程、Java程序语言辅导

Lab 10:  Practicing Recursive Functions

Learning Objectives:  The objective of this lab is to gain experience with writing recursive functions.

Assignment: Write in Java programming language for the following recursive functions (no credit for iterative implementations) and Write a main method to test the functions

a.Write a recursive function writeLine() that writes a character repeatedly to form a line of n characters. For example, writeLine('*',5) should produce the line *****.

b.Write a recursive function writeBlock() that uses the method writeLine() to write m lines of n characters each. For example, writeBlock('*',5,3) should produce the following output:

*****

*****

*****

c.Write a recursive function writeBackward() that write a given string of characters in reverse order.  For example, writeBackward(“abcde”, 5) should give the output: edcba

d.Write a recursive function displayArrayList(ArrayList<int> A, int first, int last) that receives an ArrayList A, first index, last index and displays the ArrayList in order

e.Write a recursive function int vowels(String s, int size) that receives a string and returns the number of vowels in the string

f.Write a recursive function void ReverseString (String s)  that receives a string and print the string backwards.  

Submission

Follow our class coding standard to complete this lab, compile and run it, check out for credit.