typedef in C++

typedef: We can define our own type and it in the program.

syntax: typedef existing_type new_type_name ;

For example:

typedef int number;

typedef char* pchar;

typedef double[10] dblenum;

Now we can use them as follows

number a;

pchar ptch2;

dblenum money;

When to use it:

- Can be used as alias of frequent used types

- also useful when change type later version

- Shorter name of long and confusing name