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     The abort function prints the message
 
          abnormal program termination
 
     to stderr, then calls raise( SIGABRT ). The action taken in
     response to the SIGABRT signal depends on what action has been
     defined for that signal in a prior call to the signal function.
     The default SIGABRT action is for the calling process to terminate
     with exit code 3, returning control to the parent process or
     operating system.
 
     The abort function does not flush stream buffers or perform atexit
     or onexit processing.
 
     In multithread libraries, the abort function does not call
     raise( SIGABRT ). Instead, it simply terminates the process with
     exit code 3.
 
     Return Value
 
     The abort function does not return control to the caller. Rather,
     it terminates the process and, by default, returns an exit code
     of 3 to the parent process or operating system.
                                    -♦-