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homework2 - 15-100 HOMEWORK 2 FALL 2007 Finish reading...

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15-100 HOMEWORK 2 - FALL 2007 Finish reading Chapter 2 of your textbook and answer the following questions based on this reading and the course lecture material. 1. Assume that the following initial values have been assigned to the indicated variables: int a = 123; int b = 456; double c = 7.89; For each pair of statements, determine the exact output the Java code fragments and explain specifically why the output of each pair of statements is different. (a) System.out.println(b / a); System.out.println((double)(b / a)); (b) System.out.println(((int)c * 10.0 + 0.5) / 10.0); System.out.println((int)(c * 10.0 + 0.5) / 10.0); (c) System.out.println(Math.floor(c)); System.out.println((int)c); (d) System.out.println(a + b); System.out.println("" + a + b); 2. Let String months = "JanFebMarAprMayJunJulAugSepOctNovDec" . Show how to use the String variable months and the methods of the String class to print out the strings below. For example: If the desired output is j , we could write the command: System.out.println(months.charAt(0)); (a) Jan (b) Dec (c) j*nfebm*r*prm*yjunjul*ugsepoctnovdec (d) JUNJULAUG 3. Using the
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