1.  

  includes
  int main()
  variable declarations
  program body
  return 0

Note:  it works fine if you put the variable declarations ABOVE the int main();
however, it is preferable to place them INSIDE the main() function whenever possible.


2.

  int count;
  double distance;
  char letter;

Note:  make sure you use the variable names that were given!
Note:  don't forget the semi-colons.
Note:  don't add code that wasn't asked for (e.g. int main() etc.)


3.

  if (x == 1) {
    printf("1 second");
  } else {
    printf("%i seconds", x);
  }

Note:  make sure you used the double-equals operator (==) instead of just one (=).
Note:  the curly braces in this example are optional.
Note:  although it wasn't specified that x was an integer, it is a reasonable assumption;
otherwise, it doesn't make sense to test for exact equality with 1 (remember, use thresholds
for floating-point equality testing).
Note:  don't use a variable other than "x"!
Note:  don't add code that wasn't asked for (e.g. scanf(), int main() etc.)


4.

  if (type == 3) {
    x = x * 2;
  } else if (type == 4) {
    x = x + 2;
  } else if (type == 7) {
    x = x * x;
  } else {
    x = x + 1;
  }

Note:  curly braces are optional in this example.
Note:  make sure you test "type", not "x" in the boolean expression!
Note:  make sure you used the double-equals operator (==) instead of just one (=)
for the boolean expression.


5.

  False.

Note:  "switch" is limited to to testing integral types for exact equality only; "if" can
do much more, such as testing numeric ranges using < and/or >, comparing floating-point
types, and using complex boolean expressions.  Therefore "if" is much more flexible and
powerful than "switch".