The 10 Most Common C++ Mistakes

Part of the C++ All-In-One For Dummies Cheat Sheet

Although many C++ programmers take measures to prevent bugs, mistakes still slip through. This list of the ten most common mistakes while writing C++ code can help both new and veteran programmers:

  1. You forgot to declare the variable.

  2. You used the wrong uppercase and lowercase letters; for example, you typed Main when you meant main.

  3. You used one equal sign (=) when you were supposed to use two (==), either in an if statement or in a for loop.

  4. You forgot #include <iostream> or using namespace std;.

  5. You dropped the laptop in the swimming pool.

  6. You forgot to call new and just started using the pointer anyway.

  7. You forgot the word public: in your classes so everything turned up private.

  8. You let the dog eat the remote.

  9. You forgot to type the parentheses when calling a function that takes no parameters.

  10. You forgot a semicolon, probably at the end of a class declaration.

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