Name: ____________________________________________________ Alpha: _____________ Section: ________

Describe help received: _________________________________________________________________

See the bottom for how to submit your work.

Due: Before 0800 on next class day

1. (10 pts) Read today's lecture notes. Honestly declare how you read the notes.
   1. (10 pts) I read the notes carefully. I have a good understanding of the topics therein.
   2. (10 pts) I read the notes carefully, but I don't really understand the following points well:

   3. (0 pts) I didn't read the notes carefully.
2. [20pts] Assume the following delcarations and function definitions fill in the table. Note: "error" is a possiblity! Note: each question is independent, i.e. no side effects of one expression should be taken to carry over to the next.
   Tip: If necessary, write a code and test it!

   
   int n = 2;
   string s = "hard";
   double x = 2.25;
   
   int* A = new int[3];
   string* B = new string[2];
   double* XX = new double[3];
   
   A[0] = 6; A[1] = 9; A[2] = 8;
   B[0] = "hi"; B[1] = "bye";
   XX[0] = 5.1; XX[1] = 5.4; XX[2] = 5.7;
   
   double sqr(double z) { return z*z; }  
   
   bool isneg(int k) { return (k < 0); }
   

   expression	type (or error!)	value (or error!)
   XX		N/A
   A		N/A
   XX[0]
   A[1] - x
   A[0] = XX[n]
   ++A[2]
   B[1]
   A[1] + XX[1]
   sqr(A[0])
   sqr(XX[0])
   isneg(XX[0])

3. [70pts] Write a program hw.cpp that works like this:
   • The program reads from the user an integer size and two vectors v and w of that size.
   • It outputs the dot products <v,w> and <w,v>.
   • As shown in the sample runs below, your program should print out how the dot products are computed.

   ~/$ ./hw N = 3 X = [1.1, 2.2, 3.3] Y = [1, -1, 0.1] <X,Y> = 1.1 * 1 + 2.2 * (-1) + 3.3 * 0.1 = -0.77 <Y,X> = 1 * 1.1 + (-1) * 2.2 + 0.1 * 3.3 = -0.77

   ~/$ ./hw N = 1 A = [-1.2] B = [-4.3] <A,B> = (-1.2) * (-4.3) = 5.16 <B,A> = (-4.3) * (-1.2) = 5.16

Submit to the submission server (due: 0800 on the next class day)

 ~/bin/submit -c=IC210 -p=hw19 hw.cpp 

• A printout of this homework sheet annotated with your answers
• The codeprint of hw.cpp.