Here's an outline of the fourth week

• Miscellaneous
  • More practice with mixed expressions - implicit and explicit type conversion
  • Trick for how to round floats to integers (instead of truncating)
  • Trick for swapping the values of two variables
  • Precedence of operators (listed in tables), know when and why to look at the precedence chart
  • More on boolean expressions: ! and !=
  • Walking (stepping) through a program
  • Another multi-way selection structure: switch (form, flowchart, example)
• Loops (repetition structures)
  • while (flowchart, form, examples)
  • do/while (flowchart, form, examples)
  • when to use while vs. do/while (do/while always executes statement at least once, and checks expression after executing statement)
  • for (flowchart, form, examples)
  • controlling loops: counters, sentinels, flags
  • Controlling loops with while: don't forget to initialize variables before loop and to update them after the loop
  • Controlling counter-controlled loops with for: worry about what value to start counter, worry about if loop condition should be < or <=, worry about how to increment/decrement/update the counter
• Using pre-defined functions
  • Pass values to the function by enclosing them in parentheses
  • Functions can return values - you can output them or store them with assignment statements
  • To use predefined math functions (such as sqrt), don't forget to #include <cmath>