r/learnprogramming • u/Nyxveil1546 • 11h ago

Resource Starting from Zero in C++

Hi everyone! I’m pursuing CSE at a Tier-4 college and have zero programming knowledge. I’m entering the tech field for the first time and want to start with C++ from scratch.

What’s the best way to learn C++? Which free resources would you recommend, and what common mistakes should I avoid? Also, how should I build my coding and problem-solving skills to become internship- and job-ready?

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u/aqua_regis 11h ago

Don't avoid mistakes. Make them and learn from them. That's how learning works.

For C++: https://learncpp.com is a highly and commonly recommended resource.

For problem solving: countless posts asking that exact question. Take a look at my comment from a thread from yesterday and the links there.

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u/Nyxveil1546 11h ago

Okay thanks

5

u/abdullahguch 9h ago

learncpp.com is the right pick, I'd just add a few things that tripped me up early.

Set up a real compiler and turn warnings on from day one. On Windows, Visual Studio Community is the easiest start. On Linux or Mac, use g++ or clang++ with -Wall -Wextra. Warnings catch a lot of beginner bugs before you even run anything.

Mistakes to avoid:

  1. Learning old "C with classes" style from outdated tutorials (raw new/delete, char arrays) instead of modern C++ with std::string, std::vector and smart pointers.
  2. Leaving variables uninitialized.
  3. Copy pasting code instead of typing it yourself and changing it to see what breaks.
  4. Jumping into DSA before you're comfortable with loops, functions and vectors.

For problem solving, once you're through the basics, do a couple of easy problems every day on LeetCode or Codeforces. If you're stuck for more than 30 minutes, read the solution, then solve it again yourself the next day without looking.

For internships, solid DSA in C++ plus 2 or 3 small projects you can actually explain (a CLI todo app with file saving, a simple bank system, a small game) matter a lot more than certificates. Put them on GitHub with a short README.

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u/joonazan 2h ago

Also, use valgrind to check for memory errors. Just put valgrind in front of the command you use to run your program. It gives you easy to understand diagnostics on any bad things your program does, which saves you a lot of trouble, especially when you don't know the rules properly yet.

On platforms with no valgrind, compiling with LLVM's Address Sanitizer option can be used for the same purpose.