C++ Beginner · Lesson 03 of 8

Control flow & functions

Branching, loops, parameters, overloads, default arguments.

Estimated time · 4h

Guided lesson

Work through these steps

1.
Read the control flow & functions example and identify what each line owns or changes.
2.
Create a small source file, compile with warnings enabled, and run it from the terminal.
3.
Change one input, predict the result before running, then compare the output.
4.
Record one compiler or runtime error and explain the correction in your own words.

Example

Try it yourself

double clamp(double value, double low, double high) {
  if (value < low) return low;
  if (value > high) return high;
  return value;
}

Practical exercise

Apply the lesson

Build a small robotics-flavoured program that demonstrates control flow & functions. Keep the first version simple, compile with -Wall -Wextra, and test one normal and one edge case.

Before you continue

The program builds without warnings
You can explain the key rule without reading the example
The normal and edge cases both have recorded results