Frequencies of Grades, revisited

int grade; // the grade being processed.

// Let histogram be represented by a NatMultiset.

NatMultiset hist = new NatMultiset(100000,250);

/* “Process” grades until (but not including) a stopping signal of -1. */

grade = in.readInt();

while (grade != -1 ) {

hist.insert(grade);

grade = in.readInt();

}

/* Print histogram. */

System.out.println(”Grade Frequency”);

NatMultisetEnumeration enum =

hist.enumerator();

while ( enum.hasMoreElements() ) {

NatMultisetElement el = enum.nextElement();

System.out.println(

el.item + ” ” + el.multiplicity

);

}

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