Execute the program in debug mode. Display the operating-system variable. This time you may specify its name instead of its address. Set a monitor for the operating-system variable. Continue the program.
Control returns to the debugger when the value of operating-system changes.
This option specifies source-level debugging. Using the dir command, find the size of the new object file, train.obj . The size of this object file is larger than the previous versions. Execute the program in debug mode. Experiment with some of the debugger features.