Structure of C Program

• C is a case sensitive language.
• C Program consist of one or more functions.
• One function that must be present in every C program is main(). This is the 1st function called up when program execution begins.

C program basically consists of the following parts:

• Preprocessor Commands
• Functions
• Variables
• Statements & Expressions
• Comments

Structure of C Program is illustrated below :

            //Preprocessor directives

            //Global data declarations

            main() // main function
            {
            //Declaration part;

            //Program statements;

            }

            //User defined functions
            func1()
            {
            ....
            }

            func2()
            {
            ....
            }

            .
            .
            .

            funcn()
            {
            ....
            }