Blocks and Scopes

Name: ____________________________________________________ Alpha: _____________ Section: ___________

Describe help received: _____________________________________________________________________

See the bottom for how to submit your work.

Due: Before 0800 on next class day

[10 pts] Read today's lecture notes carefully. 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.
[4pts] Using the hexadecimal system, calculate the following (the result must be in the same base):

0x3c + 0x94 =

[8pts] Consider the following program and program output. Annotate the memory diagram on the right with the variable names and their values so that the diagram shows the state of memory just after the code has been executed.

code	output
`int p; int q; p = 5; p = p + 7; q = p - 2; cout << &p << endl; cout << &q << endl;`	0x7ffff79351d0 0x7ffff79351dc

memory diagram

   address              value          (annotate variables p and q)
0x000000000000
...
0x7ffff79351c4
0x7ffff79351c8
0x7ffff79351cc
0x7ffff79351d0
0x7ffff79351d4    
0x7ffff79351d8    
0x7ffff79351dc            
...
0xffffffffffff

[10pts] Consider the following code:
```
int p;
p = 1;
cout << &p << endl;
{
  int p;
  cout << &p << endl;
}
cout << &p << endl;
```
- True or False: The above code will always print out three lines.
- True or False: The program will always print out 1 in the first line of the output.
- True or False: The first line and the second line will always be the same.
- True or False: The first line and the third line will always be the same.
- True or False: The second line and the third line will always be the same.

[10pts] Consider the following code. Fill out the table on the right.


string s, t, r;

cin >> s;
if( s == "hello" )
{
  cin >> t;
  string s;
  s = s + "." + t + ".world";
}

cin >> r;
s = s + "." + r + ".programmers";
cout << s << endl;

Input to the program	Program output
`hello wonderful go`
`computer science nice`

[20pts] Consider the following code below. Fill out the table.


char c1, c2;
string s1, s2;

cin >> c1;
if( c1 == 'I' )
{
  cin >> c2; 
  if( c2 == 'C' )
  {
    cin >> s1;
    cout << c1 << c2 << s1 << endl;
  }
}
else
{
  if( c1 == 'i' )
  {
    cin >> s1 >> s2;
    cout << c1 << s1 << " " << s2 << endl;
  }
  else
  {
    cout << c1 << endl;
  }
}

Input to the program	Program output
IC210 rocks
Ic210 rocks
ic210 rocks
210 really rocks
Homework Homework

[18pts] Consider the declarations and initializations below. Fill in the table with the type and values for the given expressions.

Note: each expression should be taken as independent. I.e. if one expression modifies some variable values, those modifications do not carry over to the next expression.


int n, m;
double x = 17.8;
char c = 'A';
bool b = false;
n = 5;
m = 3;

expression	type	value
`n + 2`
`n / m`
`n % n`
`n * (x = 20.1)`
`15 < x \|\| x <= 5`
`!x && n`
`c + 3`
`c == 'v'`
`c + 3 == 68`

Turn in (Due: 0800 on the next class day)

Written portion: Print out this homework assignment and annotate your answers to the written portion. Turn in the hardcopy in class.