Assignment 1, due Jan 25

On every assignment, write your name legibly as it appears on your University ID card! Homework is due on paper at the start of class on the day indicated (usually Friday). Exceptions will be made only by advance arrangement (excepting "acts of God"). Late work must be turned in to the TA's mailbox (ask the CS receptionist in 14 MLH for help). Never push homework under someone's door!

1. What is your E-mail address? (probably firstname-lastname@uiowa.edu, but this does not always work, for example, douglas-jones@uiowa.edu is not teaching this course.)

   Homework questions based on prerequisite material:

2. Background: Consider this function in C (but C++, Java and C# look very similar):

   int funct( int i ) { /* warning!  This is not the fibonacci series */
      if (i > 1) {
         i = funct(i - 1) - funct(i - 2);
      }
      return i;
   }
   

   Problem: Make a table of the values of funct(i) for values of i ranging from 0 to 10. (1 point)

3. Background: Consider these functions in C (but C++, Java and C# look very similar):

   char digit_a( int i ) {
       const char digits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};
       return digits[i % 10];
   }
   
   char digit_b( int i ) {
       return (i % 10) + '0';
   }
   

   A Question: These functions do essentially the same thing for non-negative values of i. Why do they behave very differently for negative values? (1 point)

   Homework questions based Chapter 2 of the text:

4. A Problem: Give the 7-bit ASCII representation of the text "January 2012" Don't include the quotes. Give your result as a column of binary numbers, one per character. (1 point)