c++ get type name

The typeid operator in C++ allows you to retrieve the name of the type of an object or expression at runtime. Here are the steps involved in using typeid to get the type name in C++:

Include the <typeinfo> header: To use the typeid operator, you need to include the <typeinfo> header in your C++ program. This header provides the necessary functionality for type identification.
Declare a variable: Declare a variable of the type you want to get the name of. This can be any object or expression whose type you want to determine.
Use the typeid operator: To get the type name, use the typeid operator followed by the object or expression whose type you want to determine. The typeid operator returns a std::type_info object that represents the type of the specified object or expression.
Retrieve the type name: The std::type_info object returned by the typeid operator provides a member function called name(), which returns a const char* pointer to a null-terminated string representing the type name. You can retrieve the type name by calling this member function.

Here's an example that demonstrates the usage of typeid and retrieves the type name:

#include <iostream>
#include <typeinfo>

int main() {
    int num = 10;
    const std::type_info& type = typeid(num);
    std::cout << "Type name: " << type.name() << std::endl;
    return 0;
}

In this example, we include the necessary headers, declare an int variable num, use the typeid operator to get the type information of num, and then retrieve the type name using the name() member function. Finally, we print the type name to the console.

The output of this example would be something like:

Type name: int

This demonstrates how to use the typeid operator to get the type name in C++. Let me know if you have any further questions.