Topic Guide: Display the line states of lcs::Bus and lcs::InputBus objects

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Both lcs::Bus and lcs::InputBus classes are provided with an overloaded operator '<<' which can be used to display the line states onto the std::stdout device. The usage is very similar to how one would use the '<<' operator for display of the standard data types.

lcs::Bus<3> bus;
cout << bus;

The above code will print xxx on the stdout device. Each x denotes the lcs::UNKNOWN state of the 3 lines of the bus. Similarly, the following code will print 101 on the stdout device.

lcs::Bus<3> bus(5); // The lines of the bus have been initialised to a binary equivalent of the decimal 
                    // integer 5. 

cout << bus;

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