Method outputBarChart
Method outputBarChart (lines 107–137) is nearly identical to the one in Fig. E.13. However, to output the overall grade distribution for a whole semester, the method here uses nested enhanced for statements (lines 115–119) to create the one-dimensional array frequency based on all the grades in the two-dimensional array. The rest of the code in each of the two outputBarChart methods that displays the chart is identical.
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