C Programming

The core syntax is small and quick to pick up, but C hands you manual memory management and pointers with none of the guardrails higher-level languages provide. Most of the real difficulty is building the mental model for memory, not the syntax itself.

C first is a common path if you want to deeply understand memory, pointers, and how a computer actually executes code, since C++ adds abstractions (classes, RAII, templates) on top of that same foundation. If your goal is application or game development sooner, starting directly in C++ is also reasonable.

malloc allocates a block of memory and leaves its contents uninitialized — whatever was there before. calloc allocates memory for an array of elements and zeroes it out before returning, at a small performance cost. Reaching for calloc is a common way to avoid bugs from reading uninitialized memory.

C was designed to run close to the hardware with minimal runtime overhead, so it never shipped a garbage collector. That trade-off gives you precise control over performance and memory layout, but it also means every malloc needs a matching free, or you leak memory — and every pointer needs care, or you get dangling references.

C99 or C11 cover almost everything you'll need and have the widest compiler support, which is why they're still the default for most codebases. C23 adds newer conveniences (like nullptr and improved type inference) but tooling and compiler support are still catching up, so check what your compiler and target platform actually support before opting in.

Be comfortable with pointer arithmetic, the stack vs heap distinction, and manual memory management, and be able to explain common bugs like dangling pointers, buffer overflows, and memory leaks. Practice implementing basic data structures — linked lists, hash maps — from scratch, since interviewers often use them to probe your pointer fluency.