9.8 Programming Exercises

Exercise 9-1: Write a procedure that counts the number of words in a string. (Your documentation should describe exactly how you define a word.) Write a program to test your new procedure.

Exercise 9-2: Write a function begins(string1, string2) that returns true if string1 begins string2. Write a program to test the function.

Exercise 9-3: Write a function count(number, array, length) that will count the number of times number appears in array. The array has length elements. The function should be recursive. Write a test program to go with the function.

Exercise 9-4: Write a function that will take a character string and return a primitive hash code by adding up the value of each character in the string.

Exercise 9-5: Write a function that returns the maximum value of an array of numbers.

Exercise 9-6: Write a function that scans a string for the character "-" and replaces it with "_".