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    [ Definition Section ]
    [ Global declaration section ]


    void main(){

    [ Variable declaration section ]
    [ Function declaration section ]
    [ Executable statements ]

    }

    function definition 1
    {
      ---------------------
      ---------------------
    }


    function definition 2
    {
      ---------------------
      ---------------------
    }
  
  

Example Program:

  #include< stdio.h >
  int main()
  {
  int n1 = 0, n2 = 1, n3, i, number;
  printf( " Enter the number of elements: " );
  scanf(" %d ", &number );
  printf( " \n %d %d ", n1, n2); //printing 0 and 1
  for( i = 2; i < number; ++i)

   /*   for loop starts from 2 because 0 and 1 are already printed   */

     {
      n3 = n1 + n2;
      printf(" %d ",n3);
      n1 = n2;
      n2 = n3;
     }
       return 0;
   }