how to find typein c++
To find the type of a variable in C++, you can use the typeid
operator or the decltype
specifier. Here are the steps to find the type of a variable in C++:
Include the necessary header files: Before using the
typeid
operator or thedecltype
specifier, you need to include the<typeinfo>
header file.Declare a variable: Declare the variable for which you want to find the type. For example, let's say we want to find the type of a variable called
myVariable
.Using the
typeid
operator: To find the type of a variable using thetypeid
operator, you need to use thetypeid
keyword followed by the variable name. Thetypeid
operator returns astd::type_info
object representing the type of the variable.
cpp
#include <typeinfo>
...
typeid(myVariable); // Returns a std::type_info object
- Using the
decltype
specifier: To find the type of a variable using thedecltype
specifier, you need to use thedecltype
keyword followed by the variable name. Thedecltype
specifier returns the type of the expression passed to it.
cpp
decltype(myVariable); // Returns the type of myVariable
That's it! By using either the typeid
operator or the decltype
specifier, you can find the type of a variable in C++. Remember to include the <typeinfo>
header file if you're using the typeid
operator.