Question

3.1.1 Write a client that creates a symbol table mapping letter grades to numerical scores, as in the table below, then reads from standard input a list of letter grades and computes and prints the GPA (the average of the numbers corresponding to the grades). A+ | A | A- | B+ | B | B- | C+ | C | C- | D 433 4.00 3.67 3.33 3.00 2.67 2.33 2.00 1.67 1.00 0.00

Answer 1

Compilation: javac GPA.java *Execution: *Dependencies: ST.java, StdIn.java, * %java GPA java GPA read Letter grades from standard input) (ctl-z for windows) * ctl-d *4.0 public class GPA public static void main (String[] args) { String[] double[] letters= grades = { { "A+", 4.33, "А", 4.00, "А-", 3.67, "B+", 3.33, "в", 3.00, "B-", 2.67, "C+", 2.33, "C", 2.00, "С-", 1.67, "D", 1.00, "F" 0.00 }; }; // build the symbol table ST String, Double> letterG rades new ST<String, Double>(); for (int i = 0; i < letters. length; i++) { letterGrades.put (letters[i], grades[i]); Read List of Letter grades and compute GPA double sum = 0.0; int count = 0; while (StdIn.isEmpty)) f String grade - StdIn.readString) double num letterGrades.get(grade); count++ double gpa = sum / count; Stdout.println(gpa);