Is it possible to define new functions with the same name as standard library functions?

Yes, it is possible to define new functions with the same name as standard library functions in most programming languages, including C and C++. However, this can lead to name collisions and ambiguity, making it difficult for the compiler to determine which function to use. To avoid such issues, it's a good practice to use unique names or namespaces. Additionally, overriding standard library functions can lead to unexpected behavior and should be done with caution.