#includeIn this example, we create a new TFile object named "file" by opening the ROOT file, "myfile.root", in read-only mode. We then use the IsZombie function to check if the file is valid or not. If it is, we can proceed with the operations we want to perform on the file. Overall, the TFile IsZombie function is useful for identifying and handling errors that may occur when working with input/output files in ROOT. It is a function from the ROOT package library.#include "TFile.h" int main() { TFile* file = new TFile("myfile.root", "READ"); if (file->IsZombie()) { // Check if file is valid std::cout << "Error opening file" << std::endl; } else { // File is valid, perform operations ... } delete file; // Free memory return 0; }