Sure, here's a simple example that demonstrates how to use type traits:

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#include <iostream>
#include <type_traits>

int main()
{
    // Check if int is a fundamental type
    std::cout << "Is int a fundamental type? ";
    if (std::is_fundamental<int>::value) {
        std::cout << "Yes" << std::endl;
    } else {
        std::cout << "No" << std::endl;
    }

    // Check if std::string is a class type
    std::cout << "Is std::string a class type? ";
    if (std::is_class<std::string>::value) {
        std::cout << "Yes" << std::endl;
    } else {
        std::cout << "No" << std::endl;
    }

    // Get the size of a double
    std::cout << "Size of double: " << sizeof(double) << std::endl;

    return 0;
}
In this example, the std::is_fundamental type trait is used to check if the type
int is a fundamental type (which is true), and the std::is_class type trait is used
to check if the type std::string is a class type (which is also true).
Additionally, the sizeof operator is used to get the size of a double type.

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This example demonstrates how type traits can be used to check the properties of types, and how this information can be used to make decisions about how to handle different types in the code.Type traits are a feature in C++ that allow you to query the properties of a
type at compile-time. Type traits are implemented as a set of template structs
and functions in the <type_traits> header. They can be used to obtain information
about the properties of a type, such as its size, alignment, and whether it is a
fundamental type or a class type.

Here are some examples of how to use type traits:

To check if a type is a fundamental type:
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template<typename T>
void print_type()
{
    if constexpr (std::is_fundamental<T>::value) {
        std::cout << "The type is a fundamental type" << std::endl;
    } else {
        std::cout << "The type is not a fundamental type" << std::endl;
    }
}
To check if a type is a class type:
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template<typename T>
void print_type()
{
    if constexpr (std::is_class<T>::value) {
        std::cout << "The type is a class type" << std::endl;
    } else {
        std::cout << "The type is not a class type" << std::endl;
    }
}
To get the size of a type:
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template<typename T>
void print_size()
{
    std::cout << "The size of the type is: " << sizeof(T) << std::endl;
}
Type traits can be used to write more generic and reusable code, as well as to
improve the performance of the code by allowing the compiler to make decisions at
compile-time rather