Ooops..! yes, this is an another post related to OOP. I feel this is some thing nice. There are situations where we want to introduce new data variables. That's why enumerated data types are used. haha, but this is not like u expect! Enumerated Datatypes These are user defined datatypes the key-word enum is used syntax is enum var_name{var1,vae2,...,varn}; what happens is : var1=0, var2=1, var3=2, var4=3,... try the prog. below in ur cpp compiler. #define #define key-word is used. Eg: #define x value No ";" is used advantage: for a large program, if we want to alter a constant that is repeatedly used throughout the programme. meaning x can be used insted of value. For the perfect understanding, please work on the example below. (Shhhh... it is very simple!) _____________________________________________ // using enumerated data types, #define #include<conio.h> #include<iostream.h> #define num 60 #define name 0 void main() { clrscr(); enum b{q,w,e}; cout<...