Write a program similar to Listing 7.9, Calculator.java. Instead of using integers, use rationals, as shown in Figure 13.10a. You will need to use the split method in the String class, introduced in Section 10.10.3, Replacing and Splitting Strings, to retrieve the numerator string and denominator string, and convert strings into integers using the Integer.parseInt method.java Exercice1" style="" class="fr-fic fr-dib">

FIGURE 13.10 (a) The program takes three arguments (operand1, operator, and operand2) from the command line and displays the expression and the result of the arithmetic operation. (b) A complex number can be interpreted as a point in a plane.

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0a. Command Prompt c:\exercise>java Exercise13 16 3/4 + 1/5" 3/4 + 1/5 = 19/20 y-axis -2 + 3i c:\exercise>java Exercice13_16 "3/4 1/5" 3/4 -1/5 = 11/20 х-ахis c:\exercise>java Exercise13_16 "3/4 x 1/5" 3/4 * 1/5 = 3/20 3 - 2i C:\exercise> (b) (a) 1 public class Calculator { /** Main method */ public static void main(String ] args) { // Check number of strings passed if (args.length != 3) { System.out.println( "Usage: java Calculator operand1 operator operand2"); System.exit(0); 4 8 10 11 12 13 // The result of the operation int result = 0; // Determine the operator switch (args[1].charAt(0)) { case '+': result = Integer.parseInt(args[0]) + 14 15 16 17 18 19 20 21 22 Integer.parseInt(args[2]); break; case '-': result = Integer.parseInt (args[0]) - Integer.parseInt(args[2]); break; case '.': result = Integer.parseInt(args[0]) * Integer.parseInt(args[2]); 23 24 break; case '/': result = Integer.parseInt(args[0]) / Integer.parseInt(args[2]); 25 26 27 28 // Display result System.out.println(args [0] + + result); 29 30 + args[1] + + args[2] 31 32 33 } ৪ ल