What is the usage of typedef in C++?

In C++, typedef is used to create an alternative name for an existing type. Its syntax is as follows:

Declare a new type name using an existing type.

Using typedef in C++ allows you to create a new name for basic types, custom types, structures, classes, etc., making the code clearer and easier to read.

For example, the following code creates a new name “Integer” for the int type.

Integer is defined as an integer data type.

Now, it is possible to use Integer instead of declaring variables as int.

The value of the integer variable is 10.

By using typedef, we can use Integer instead of int in the code to improve readability and maintainability.

The typedef keyword can also be used to create pointers to functions. For example:

a function pointer that takes an integer as an argument

The above code defines a new type called FunctionPointer, which is a pointer to a function that takes an integer as input and returns void. This FunctionPointer type can be used to declare pointer variables that point to the corresponding functions.

In conclusion, the purpose of typedef in C++ is to create a new alias for existing types, improving the readability and maintainability of the code.