How to made program with C++

The general structure of the existing program in C + + as below :

#include <conio.h>
#include <iostream.h>

void main ()
{
  clrscr();
  /* Write your coding here ... */
  ...
  ...
  ...

getch();
}

-include : treats text in the specified filename as if it appeared in the current file.
-conio.h & iostream.h : declare some library functions are included to perform "console input and output" of a program.
-clrscr : clear screen.
-getch : to view character in program.