What is the "terminate" function in C++, and how to customize its behavior?

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Aryan Kumar · Answer

The terminate() function in C++ is called by the C++ runtime when the program cannot continue for any of the following reasons:
An exception is thrown and not caught.A destructor throws an exception and that exception is not caught.The constructor or destructor of a nonlocal static object throws an exception and that exception is not caught.A function registered with atexit() throws an exception and that exception is not caught.
The terminate() function does not return. It simply calls the function pointed to by the
terminate_handler variable. By default, the terminate_handler variable points to the
abort() function, which exits the program.
To customize the behavior of the terminate() function, you can set the
terminate_handler variable to a different function. The function that you set should take no arguments and return no value.
Here is an example of how to customize the behavior of the terminate() function:
C++
#include andlt;iostream>
#include andlt;exception>
using namespace std;
void my_terminate_handler() {
  cout andlt;andlt; "The program has terminated due to an unrecoverable error." andlt;andlt; endl;
  exit(1);
}
int main() {
  set_terminate(my_terminate_handler);
  // This will cause the program to terminate and print a message
  throw std::runtime_error("An unrecoverable error has occurred.");
  return 0;
}
In this example, we have set the terminate_handler variable to the
my_terminate_handler() function. The my_terminate_handler() function simply prints a message and then exits the program.
It is important to note that the terminate() function should only be used as a last resort. It should be used when the program cannot continue in any way. If you use the
terminate() function too often, it can make your program difficult to debug.

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What is the "terminate" function in C++, and how to customize its behavior?

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