C Struct Examples In this article, you'll find a list of examples related to structs in C programming. A structure is a collection of variables of different data types. C struct C structs and pointers C structs and functions C struct Examples Store information of a student using structure Add two distances in inch-feet Add two complex numbers by passing structures to a function Calculate the difference between two time periods Store information of 10 students using structures Store information of n students using structures.
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Compiler Design. Computer Organization. Discrete Mathematics. Ethical Hacking. Computer Graphics. Software Engineering. Web Technology. Cyber Security. C Programming. Control System. Data Mining. Data Warehouse. Javatpoint Services JavaTpoint offers too many high quality services. Let's first discuss about C programming. C programming C language combines the power of a low-level language and a high-level language.
The essential features of a C program are as follows: Pointers: it allows reference to a memory location by the name assigned to it in a program. Recursion: When a function calls itself, it is known as recursion. Let's start with the importance of specifying the structure of a C program. Importance of structure of a C program Sometimes, when we begin with a new programming language, we are not aware about the basic structure of a program. Let's start. Sections of a C program The sections of a C program are listed below: Documentation section Preprocessor section Definition section Global declaration Main function User defined functions Let's discuss it in detail.
Documentation section It includes the statement specified at the beginning of a program, such as a program's name, date, description, and title. Preprocessor section The preprocessor section contains all the header files used in a program. Define section The define section comprises of different constants declared using the define keyword.
Main function main is the first function to be executed by the computer. The main function is declared as: main We can also use int or main with the main. Local declarations The variable that is declared inside a given function or block refers to as local declarations.
Expressions An expression is a type of formula where operands are linked with each other by the use of operators. The program basic or advance follows the same sections as listed above.
It is given by: return; Or return expression ; For example, return 0; Examples Let's begin with a simple program in C language. It is the comment section. Any statement described in it is not considered as a code. It is a part of the description section in a code. The comment line is optional. It can be in a separate line or part of an executable line.
We have used int with the main in order to return an integer value. The curly braces mark the beginning and end of a function. It is mandatory in all the functions. The printf prints text on the screen. It is a function for displaying constant or variables data. The Definition section describes all the symbolic-constants. The global declaration section is used to define those variables that are used globally within the entire program and is used in more than one function.
This section also declares all the user-defined functions. Then comes the main. All C programs must have a main which contains two parts:. The declaration part is used to declare all variables that will be used within the program.
There needs to be at least one statement in the executable part, and these two parts are declared within the opening and closing curly braces of the main. Also, it has to be noted that all the statements of these two parts need to be terminated with a semi-colon.
The sub-program section deals with all user-defined functions that are called from the main.
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