Introduction to C Programming - Part II

Welcome back to series of articles on Introduction to C Programming. In this article you are going to learn the very basic structure of a C Program.

Basic Structure of C Program:-

        Preprocessor Statements

        Global Declarations

        int main()

        {

           Local Declarations

           Statement(1);

           Statement(2);

           ------------------

           ------------------

           Statement(n);

          return int_value;

       }

       User Defined Functions

 

  Example:-

    #include "stdio.h" //Preprocessor statement
    #define PI 3.1416 

    const float radius=10.5; //Global declaration

    int main()
    {
      float circumfernce;                                  //Local declaration
      circumfernce=findCicrum();                           //User defined function call
      printf("Circumference of the circle is %f",circumfernce); //printing the output
      return 0;
    }

    float findCircum()       //User defined function
    {
        return 2*PI*radius;
    }