Typedef statement allows user to define an identifier that would represent an exiting data type. The user-defined data type identifier can be used further to declare variables. It has the following syntax
typedef datatype identifier;
where datatype refers to exiting data type and identifier is the new name given to this datatype. For example
typedef int nos;
nos here symbolizes int type and now it can be used later to declare variables like
nos num1,num2,num3;
enum statement is used to declare variables that can have one of the values enclosed within braces known as enumeration constant. After declaring this, we can declare variables to be of this ‘new’ type. It has the following syntax
enum identifier {value1, value2, value3……,valuen);
where value1, value2 etc are values of the identifier. For example
enum day { Monday, Tuesday, Wednesday, Thursday, Friday, Saturday}
We can define later
enum day working_day;
working_day=Monday;
The compiler automatically assigns integer digits beginning with 0 to all enumeration constants.
