Comp 411 Spring 2007

You may find this useful for problem set 4. You can read off the hex value for any ASCII character by taking the first nibble from the first column and the second nibble from the top row. So, for this assignment, you’ll need to convert an ASCII digit, say ‘4′ with code 0×34 to the numerical value 4. Simply subtract the code for ‘0′ from it. So subtracting 0×30 from an ASCII digit will give you the numerical value of the digit. Likewise, if you want to go from a small number, say 5, to its ASCII representation, simply add 0×30 to it. 5 + 0×30 = 0×35.

In problem set 4 you’ll wrestle with writing your own programs and think about the various representations for numbers. Feel free to work together in small teams on this assignment but the work you turn in should be your own. Include in the comments at the top of your program the names of the other students on your team. This is due before class on Thursday 1 March.

You should email your answers to our TA. Attach the files for the 3 problems to your email along with examples from the simulator running it.

Study sections 2.10 - 2.15

Today we’ll look at the translation process from high-level languages to running programs. Lecture 8 slides.

We’ll have our first test next Thursday on 15 February. It will cover the material in lectures 1 through 8. We’ll review for the test on Tuesday 13 February.

The test will be open book and notes.

Today we’ll look at how procedure calls are implemented in high-level languages. Lecture 7 slides.

Problem Set 3 is now available and due Friday 16 February.

No class today.