Programming in C is done procedurally. Dennis Ritchie created it for the first time in 1972. It was primarily created as an operating system programming language. Low-level memory access, a small collection of keywords, and a clean style are the fundamental characteristics of the C language, which make it appropriate for system programming like operating system or compiler development.
Design of a C programme
After the explanation above, we may officially evaluate the C program’s structure. By structure, it is indicated that only this structure may be used to write any software. Any other structure for a C programme will result in a Compilation Error. A C programme is organised as follows:
- Main Function ()
- Variable Declaration
The following are the elements of the mentioned structure:
Incorporating header files is the first and most important step in creating a C programme.
The term “header file” refers to a file with the extension “.h” that includes shared C function declarations and macro definitions. Some C Header files include:
- stddef.h defines a number of practical types and macros.
- stdint.h – Specifies the precise width of integer types.
- stdio.h defines the fundamental input and output operations.
- stdlib.h defines string memory allocation, a pseudo-random network generator, and utilities for converting numbers.
- string.h provides functions for managing strings.
- math.h – Provides definitions for popular mathematical functions.
Principal Method Statement: The main() function declaration comes next in a C programme. The syntax for declaring the main function is:
Declarative syntax for the main method
Variable Declaration: The variable declaration comes next in any C programme. It makes reference to the variables that will be utilised in the function. Please be aware that no variable may be utilised in a C programme without first being declared. The variables must be defined in a C programme before any operations in the function.
Body: In a C programme, the actions carried out by a function are referred to as the function’s body. Anything may be included, including adjustments, searches, sorting, printing, etc.
The return statement is the concluding section of any C programme. The values from a function are returned using the return statement. The return type of the function determines this return statement’s return value. There won’t be a return statement, for instance, if the return type is void. In all other circumstances, a return statement will be present, and the returned value will be of the specified return type.