Article Tags
Article Tags
How to properly use std::shared_ptr for shared ownership in C ?
Usestd::shared_ptronlyforgenuinesharedownership—e.g.,observers,bidirectionalgraphs,orcaches—notbydefault;preferstd::unique_ptrforsingleownershipandrawpointers/referencesfornon-owningaccess.
Feb 04, 2026 am 02:58 AM
What is undefined behavior in C and how can I avoid it?
Undefinedbehaviormeansthecompilercandoanything—includingseeminglyworkingfine—andyoumusttreatitasabug,notaquirk,coveringuninitializedreads,null/danglingpointerdereferences,strictaliasingviolations,andotheredgecaseslikesignedoverfloworinvaliddeallocati
Feb 04, 2026 am 02:57 AM
What is the standard way to handle command-line arguments in C ?
The C program receives command line parameters through the intargc and char*argv[] parameters of the main function. argc is the number of parameters (including the program name), argv is a null-terminated array pointing to each parameter string, argv[0] is the program name or path, and argv[argc] is nullptr.
Feb 04, 2026 am 02:56 AM
What's the difference between a pointer and a reference in C ?
Pointers and references are both aliases but have different rules: pointers are variables that store addresses, and references are aliases for existing objects; pointers can be null, rebound, and not initialized, while references must be initialized and cannot be rebound; when passing parameters, constT& avoids copying and eliminates null values, while T* needs to be manually addressed and must be null checked; underlying references are usually implemented as constant pointers, with no runtime overhead.
Feb 04, 2026 am 02:54 AM
What is the auto keyword in C and when to use it?
Auto allows the compiler to deduce variable types from initializers to avoid verbose or unwritable types; however, it will strip off top-level const and references, requiring corrections such as auto&; overuse may reduce readability and debuggability.
Feb 04, 2026 am 02:31 AM
How to call C code from Python?
Usepybind11—it’sthemostpractical,well-maintained,andportablewaytoexposeC functionstoPythonwithoutboilerplateormanualreferencecounting.
Feb 04, 2026 am 02:19 AM
Why Do You Need a Virtual Destructor in C ? (Polymorphism Explained)
The virtual destructor is required when deleting a derived class object through a base class pointer, otherwise only the base class destructor is called, leading to resource leaks and undefined behavior; it ensures that the derived class and base class destructors are fully called in reverse construction order.
Feb 04, 2026 am 02:17 AM
How to set up VS Code for C development in 2026?
VSCodeC setuprequiresclangd,acompiler(g /clang /MSVC),andCMakeTools;verifycompilerversion≥11,useclangdovercpptools,relyonCMakeToolsforbuild/debugsync,andensurecompile_commands.jsoniscurrent.
Feb 04, 2026 am 02:10 AM
How to convert between std::string and wstring in C ?
std::wstring_convertwithstd::codecvt_utf8isdeprecatedsinceC 20butwasstandardforUTF-8↔UTF-16/32conversioninC 11–17;it’sunreliableonWindows,lacksC 20support,andplatformAPIsorUTF-8-onlyapproachesarepreferred.
Feb 04, 2026 am 01:33 AM
What is std::optional and how does it prevent null pointer errors in C ?
std::optionalisastack-allocated,value-semanticswrapperholdingeitheraTvalueornovalue,notapointerorsmartpointer;itenforcesexplicithandlingofabsenceviatypesafetyandcompile-time/runtimechecks.
Feb 04, 2026 am 01:22 AM
What are forward declarations in C and when are they useful?
Forwarddeclarationsdeclareatypeorfunction’sexistencewithoutdefiningit,enablingpointers/referencestoclassesinheaderstoreducecompilationtime;theyforbidobjectcreation,memberaccess,orsizeofusage,andfailsilentlyuntilcompletenessisrequired—e.g.,intemplates
Feb 03, 2026 am 03:15 AM
How to use std::string_view in C for performance?
std::string_viewavoidsheapallocationbystoringonlyapointerandlength,makingitidealforread-onlyaccesstoexistingstringdata;it’ssafeforfunctionparameters,literals,andparsingbutunsafewhennulltermination,mutation,orownershipisneeded.
Feb 03, 2026 am 03:12 AM
What are C 20 Modules and how do they work?
The module is a binary-compatible import unit introduced in C 20, which replaces the textual #include and eliminates preprocessor, header file guard and ODR problems. It declares the interface through export and uses import. Only the export name is visible, and the build dependencies are directly managed by the compiler.
Feb 03, 2026 am 02:59 AM
What are smart pointers in modern C ? (unique_ptr, shared_ptr)
In modern C smart pointers, unique_ptr is used for exclusive ownership and zero-overhead deterministic cleanup. Shared_ptr supports shared ownership but has reference counting overhead and the risk of circular references. Weak_ptr needs to be used to break the cycle.
Feb 03, 2026 am 02:41 AM
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