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** On paper portion.
Points: 22 points total, 6 points #1, 6 points #2, 4 points #3, 6 points #4

Last Name:


First Name: 



1) Do the conversion.  Show your work.  No credit if you don't show some work.

1a) Convert 105 decimal to binary.
...




1b) Convert 1011001 binary to decimal.
1011001 = 64 + 16 + 8 + 1 = 89






2) Answer the questions about C/C++ syntax and data types.  For each write 
   exactly what you would type in your program (including correct spelling and
   capitalization).

2a) List 4 different data types that can be used for numbers, and 
    say what is different about each.

int - 32 bit, signed integer

long int - 64 bit, signed integer

double - 64 bit, floating point, with decimal point

float - 32 bit, floating point

short int - 16 bit integer

char - 8 bit integer

In general, 2^(# bits) - 1.



2b) List the 6 comparison operators. < <= == != >= > 





2c) List the 3 boolean operators. && || ! 
and not or - those are not correct because that's not what you type in C



























3) Memorize program.  Write down the code for the validInput2.cpp 
   program.  It should ask the user for a number between 0 and 100
   and check that what they typed is between 0 and 100.  If they typed
   something outside of the range 0 to 100, the program should tell 
   them "Invalid input..." AND ask them again.  The program should 
   keep asking again until they have typed a number between 0 and 100.

























4) Be the computer.  For each, keep track of the values of all the variables
   as the code runs - as we did in class.  


4a) basic arithmetic.

// code
int x = 3, y = 2;
float z = x * y;
x = x + y * 3;
y = y / 3 + y;
y = (x + y) % 4;
z = z / 4.0;
cout << x << endl << y << endl << z << endl;

// variable values.
//
// x: 
//
// y: 
//
// z: 
//

// printed on screen: 














4b) Boolean logic, conditionals.

// code
int x = 21;
float f = 3.14;
if (x < 0 && x > 10) {
   if (f <= 3.14 ) x = x / 2;
   else x = x - 2;
   f = f - 1.0;
}
else {
   if (f < 3.0) x = x / 2;
   else x = x - 2;
   f = f - 1.0;
}
x = (f <= 3.14 && x > 100) || (f > 0 && x > 0);
cout << x << endl << f << endl;

// variable values.
//
// x:
//
// f:
//

// printed on screen: 











4c) Loops.

// code
int i = 1;
int total=1;
while (i < 4) {
  total = total * i;
  i = i + 1;
  cout << total << endl;
}

cout << i << endl << total << endl;

// variable values.
//
// i:
//
// total:
//

// printed on screen: