Amr Magdy's blog

 44 day  Enumeration Enumeration (or enum) is a user defined data type in C. It is mainly used to assign names to integral constants, the names make a program easy to read and maintain. enum State {Working = 1, Failed = 0}; 

 43 day Unions The Union is a user-defined data type in C language that can contain elements of the different data types just like structure. But unlike structures, all the members in the C union are stored in the same memory location. Due to this, only one member can store data at the given instance. Syntax of Union in C The syntax of the union in C can be divided into three steps which are as follows: C Union Declaration In this part, we only declare the template of the union, i.e., we only declare the members’ names and data types along with the name of the union. No memory is allocated to the union in the declaration. union union_name {     datatype member1;     datatype member2;     ... };

 42 day  C Structures The structure in C is a user-defined data type that can be used to group items of possibly different types into a single type. The struct keyword is used to define the structure in the C programming language. The items in the structure are called its member and they can be of any valid data type. Additionally, the values of a structure are stored in contiguous memory locations. Syntax struct structure_name {     data_type member_name1;     data_type member_name1;     ....     .... };

 41 day Pointers Pointers are one of the core components of the C programming language. A pointer can be used to store the memory address of other variables, functions, or even other pointers. The use of pointers allows low-level memory access, dynamic memory allocation, and many other functionality in C. What is a Pointer in C? A pointer is defined as a derived data type that can store the address of other C variables or a memory location. We can access and manipulate the data stored in that memory location using pointers. Syntax of C Pointers The syntax of pointers is similar to the variable declaration in C, but we use the ( * ) dereferencing operator in the pointer declaration. datatype * ptr;

 40 day  Arrays  Properties of Arrays in C It is very important to understand the properties of the C array so that we can avoid bugs while using it. The following are the main properties of an array in C: 1. Fixed Size The array in C is a fixed-size collection of elements. The size of the array must be known at the compile time and it cannot be changed once it is declared. 2. Homogeneous Collection We can only store one type of element in an array. There is no restriction on the number of elements but the type of all of these elements must be the same. 3. Indexing in Array The array index always starts with 0 in C language. It means that the index of the first element of the array will be 0 and the last element will be N – 1. 4. Dimensions of an Array A dimension of an array is the number of indexes required to refer to an element in the array. It is the number of directions in which you can grow the array size. 5. Contiguous Storage All the elements in the array are sto...

 39 day  Arrays C Array Initialization Initialization in C is the process to assign some initial value to the variable. When the array is declared or allocated memory, the elements of the array contain some garbage value. So, we need to initialize the array to some meaningful value. There are multiple ways in which we can initialize an array in C. 1. Array Initialization with Declaration In this method, we initialize the array along with its declaration. We use an initializer list to initialize multiple elements of the array. An initializer list is the list of values enclosed within braces { } separated b a comma. data_type array_name [size] = {value1, value2, ... valueN}; 2. Array Initialization with Declaration without Size If we initialize an array using an initializer list, we can skip declaring the size of the array as the compiler can automatically deduce the size of the array in these cases. The size of the array in these cases is equal to the number of elements present...