Enumerated Datatypes AND #define

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!)

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// 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<<"num ="<<num<<endl<<"name ="<<name<<endl<<"q="<<q<<"\nw="<<w<<"\ne="<<e<<endl;

getch();
}
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Also note:

• cout is an output statement
• endl is used for new line
• "\n" is also used for new line

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