Write the format of simple C program.

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Q. Write the format of simple C program.

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Concept understanding — Structure of a C Program

Every C program is built from a set of standard sections arranged in a fixed order. Knowing this layout lets you read and write programs quickly, and it is a frequently asked exam topic.

The usual sections are:

Documentation section - comments giving the program's name and purpose.
Link section - #include directives that link the standard library header files.
Definition section - #define directives that define symbolic constants and macros.
Global declaration section - variables and function declarations available to the whole program.
main() function section - the compulsory function where execution begins. It has a declaration part (local variables) and an executable part (the statements), enclosed in braces { }.
Sub-program section - the user-defined functions that main() may call.

Of these, only the main() function is essential; the others are used as needed. Because C is a free-form language, statements can be laid out on one line or many, provided each ends with a semicolon. A minimal program such as one that prints Welcome to PUC still shows the core shape: a link line, void main(), and a body in braces containing a library call like printf. Being able to reproduce this general structure and name each section is a standard 3- and 5-mark task in the Karnataka 2nd PUC Electronics course.

A simple C program consists of preprocessor directives followed by the main() function whose body holds the declarations and statements.

[!ANSWER]

#include <stdio.h>
main()
{
    // declaration part
    // statement part
}

[!TLDR]

A simple C program has a #include line, the main() function header, and a body of statements inside braces.

The general format shows where each part of a minimal program goes: the preprocessor directive brings in the standard I/O header, main() marks the start of execution, and the body (between { and }) contains the variable declarations and the executable statements, each ending with a semicolon.

#include <stdio.h>
main()
{
    // 1. declaration part - declare the variables used
    // 2. statement part - input, processing and output statements
}

Execution always begins at main(). The opening and closing braces mark the boundary of the function body, and every statement inside is terminated by a semicolon.

[!ANSWER]

A preprocessor #include directive, then main() with its body of declarations and statements enclosed in braces { } - as shown above.

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Q.Write the format of simple C program.

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