Machine Problem 2, due Feb. 23

Background: The sequence 0, 1, 3, 6, 10, 15, 21 ... is known as the triangular numbers. More formally, t(0)=0, t(1)=1, t(2)=3 ... etc. For any i t(i) gives the number of points in a triangular grid of points that has i points on a side. Wikipedia goes on and on about this sequence if you are curious. Successive members of this sequence can be computed using this recurrance relation:

• t(0) = 0
• t(i) = t(i-1) + i

Assignment: Write an iterative SMAL Hawk main program that computes outputs the first 30 members of this sequence in the following format:

       0       1       3       6      10      15      21

Elements of the sequence are printed in successive 8-space fields, with each element right-justified in its field. Note that calling the Hawk monitor routine putdec(i,8) will print the value i in precisely this format, and note that the Hawk display will automatically wrap long lines of output to the next line, so you need no nothing extra beyond computing the recurrence relation and outputting successive values using putdec().

Requirements:

For full credit:

• Your source code must be well formatted. Tabs to align columns appropriately are required.
• Your source code must appropriately commented. Write comments that say why, not merely what. Comments should be written assuming that the reader the language. If some register is consistently used to hold some logical variable, say so!
• Your source code should have a TITLE directive that (in as few words as possible) gives your name (as it appears on the class list) and the fact that this is MP2. We will not do detective work to link solutions to students. Failure to meet this requirement may result in total loss of credit.
• Additional header comments that clearly explain what is going on are welcome, but do not belabor the obvious.
• When run, your code must produce the right sequence of values.
• When run, your code must produce the right number of values.
• When run, your code must format the values correctly.

Submission: Programming assignments will be submitted on-line using the on-line Online Coursework Submission tool provided by the Liberal Arts Linux server cluster. The user interface for this is awful, but but it works. Your source file must be named mp2.a (the name is case-sensitive). This is the name you will type in response to the File/directory name prompt. When the submission tool prompts for Course type cs_2630. Select the assignment directory mp2.

You must submit your work using the submit command from the a CLAS Linux machine. If you make repeated submissions, only the last one will count.