Chapter 18, Problem 50E

Explanation of Solution

AT&T failure:

• In January 1990, AT&T’s long-distance network was halted for nine hours, because of the software error in the switching systems.
  • This causes losses in the revenue generation in hotels, rental car agencies, and telemarketing companies.
• But the earlier versions of the switching software worked correctly.
• While upgrading the system to provide a quick response, a software error occurred on a month later due to missing of the break statement in the “C-code”...