danayel / testimport2

CS510 CW 10

Author(s): <your name(s)>

Due date: 2016/11/08

Specification

Note: Remember this is a C project.

Complete the following exercises, saving your solutions in the indicated files.

1. Recall the following references, which will still be useful throughout the rest of the course.
   • Learn C in Y Minutes
   • C Cheat Sheet
   • C Programming Wikibook
   • Learn Make in Y Minutes
2. Note that a bin directory will be created by make. Pay attention to how it is used in what follows. Also pay attention to the added compiler flags in the Makefile
3. Examine the source code in src/bit_print carefully. Compile and run it.
   1. In a Jupyter notebook BitPrint.ipynb, describe what print_types does in detail. Answer the following questions.
   2. What are the integer values for the letters 'A', 'Z', 'a', and 'z'?
   3. What are the integer values for the numbers '0', '1', and '9' as characters?
   4. If you needed to store a 2D array of 10000x10000 complex numbers, how much memory would it require (in megabytes) if: a) the real and imaginary parts were each shorts? b) the real and imaginary parts were each long doubles? (Recall the prefixes: kilo = 10^3, mega = 10^6, giga = 10^9, tera = 10^12, peta = 10^15, exa = 10^18, zetta = 10^21, yotta = 10^24)
   5. Work out the algorithm for how the bit string for an unsigned int is interpreted as an integer. Describe this algorithm in your notebook.
   6. Work out the algorithm for how the bit string for a (signed) int is interpreted as an integer. How does this differ from an unsigned int? What are the maximum and minimum bounds of each? Describe this algorithm in your notebook.
4. Examine the source code in src/arrays carefully. Compile and run it.
   1. In a Jupyter notebook Arrays.ipynb, describe what arrays does in detail. Do the following.
   2. Change the type of "array" to an array of floats. Make sure the code compiles and runs.
   3. Change the type of "memblock" to a pointer to long double. Make sure the code compiles and runs.
   4. Refactor arrays.c to add two new functions: print_arrays and set_arrays. Move the existing code from main into these new functions as appropriate, and call them from main. You will have to think carefully about what types these new functions should be, and what arguments (if any) they should have, of what type(s). Make sure the code compiles and runs.
   5. In your notebook, explain what malloc and free do in detail.
5. Examine the source code in src/structs carefully. Compile and run it.
   1. In a Jupyter notebook Structs.ipynb, describe what print_structs does in detail. Answer the following questions.
   2. Explain the difference between "pass by value" and "pass by reference" in your own words. Support your explanation with concrete examples from the program output.
   3. Explain the difference between v.x and v->x for a struct v with field x.
6. Examine the existing test in test/ carefully. Compile and run it.
   1. Add another test that reimplements the "pass by reference" test in src/structs. Ensure that it passes.

Assessment

Analyze in this section what you found useful about this assignment in your own words. Include any lingering questions or comments that you may have.

CHANGEME

Honor Pledge

I pledge that all the work in this repository is my own with only the following exceptions:

• Content of starter files supplied by the instructor;
• Code borrowed from another source, documented with correct attribution in the code and summarized here.

Signed,

YOURNAME