software engineering Get address of a variable in C To get address of a variable in C, we use the address of (&) operator, the %p specifier to print it and a casting of (void*) on the address.
software engineering Rounding and Truncating numbers using math.h in C In this article, we have explored how to round and truncate numbers in C using the math.h library. that is round(), roundl(), trunc(), truncl() and others
software engineering strncmp in C strncmp is a function in C which is used to compare two array of characters upon N indexes and return if the first array is less, equal or greater than the second array.
software engineering strcmp in C strcmp is a function in C which is used to compared two strings that is array of characters and returns if the first array is greater, smaller or equal to the second array
software engineering qsort in C qsort in C is an in-built function for sorting array of any data types including structs. It, internally, uses a variant o Quick Sort and is a part of stdlib.h
software engineering gets() vs fgets() in C and C++ gets() and fgets() are functions in C language to take input of string with spaces in between characters. gets suffer from buffer overflow which is solved by fgets
software engineering ctype.h in C ctype.h header file of the C Programming Language provide several functions that are used to testing different characters and changing some properties.
software engineering Auto in C Auto is a storage class/ keyword in C Programming language which is used to declare a local variable, forward declaration of nested functions and non-contiguous memory allocation.
software engineering Volatile in C Volatile in C programming language is a keyword which is used with variables to inform the compiler not to apply any optimizations to code dealing with the variable.
software engineering Extern in C Extern is a keyword in C programming language which is used to declare a global variable that is a variable without any memory assigned to it. It is used to declare variables and functions in header files.
software engineering Register in C Register is a keyword in C which suggests the system to use register as a memory for a variable instead of RAM. This accelerates the reading and writing of memory
software engineering _Bool in C _bool is a keyword in C Programming language representing boolean data type. It is an alternative to bool in C.
software engineering List of C Compilers We have listed all major C compilers that has been in use. Some compilers were developed in 1980s (GNU GCC) while the recent ones are from 2017 (AOCC).
software engineering #if directive in C / C++ #if is a preprocessor directive in C to define conditional compilation. It can be used just like an if condition statement which impacts the compilation process
software engineering Scanf and Printf in C Printf() and Scanf() are inbuilt library functions in C language that perform formatted input and formatted output functions. These functions are defined and declared in stdio.h header file.
software engineering #include in C #include is a preprocessor directive in C and C++ to include the code from other files (header files + C/ C++ code) in the current file.
software engineering Using Assert.h in C In this article we'll talk about one of those header files, namely the assert.h header file. First we'll look at the purpose of this file, second we'll go over code examples and in the third part we'll dive a little deeper into the details of this header file and tips on how to use it.
software engineering Detect Operating System in C To check the operating system of the host in a C or C++ code, we need to check the macros defined by the compiler (GNU GCC or G++). For example, on Windows platform, the compiler has a special macro named _WIN32 defined.
software engineering #error directive in C #error is a preprocessor directive in C which is used to raise an error during compilation and terminate the process.
software engineering Compilation process in C (from code.c to a.out) Compilation is the process of converting a code in a programming language (C in our case) to machine code. In this process, the code goes through different steps depending upon the compiler and language. We will explore the compilation steps in C.
software engineering Check if a header file in C has been included To check if an header file has been included or not in a C or C++ code, we need to check if the macro defined in the header file is being defined in the client code.
software engineering #warning directive in C #warning is a preprocessor directive in C which is used to raise compilation warnings for various situations. It is different from #error directive in that #warning will not cancel the compilation process while #error will cancel it.
software engineering #undef directive in C #undef is a preprocessor directive to remove an existing macro. It is useful as the only way to update an existing macro is to delete it (using undef) and create a new macro (using define).
software engineering #define directive in C #define is a preprocessor directive in C which is used to define macros. Macros are code framents which has been given a name.
software engineering #ifdef directive in C ifdef is an include guard. ifndef can be seen as if defined then do this till endif. It is opposite of [ifndef directive
