# L07 - CS101 Lecture 7 1 Computer Science 1 1 SS C Lecture 7...

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Unformatted text preview: CS101 Lecture 7 1 Computer Science 1 1 SS C Lecture 7 Contents Defning methods: parameters, return values, return statement Coursebook: §9 2 1 2 3 4 5 6 7 8 9 10 Number of 10 minute blocks? Look at the following program which, given the number of hours and minutes, evaluates the number of complete ten minute blocks. public class TenMinuteBlocks { public void start() { } } 13 blocks totalMins = hours * 60 + minutes; tenMinBlocks = totalMins / 10; int hours = 2; int minutes = 14; int totalMins, tenMinBlocks; System.out.println(tenMinBlocks + " blocks"); 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 The problem – Doing same calculation twice ... public class TenMinuteBlocks { public void start() { } } Repetition! 13 blocks 66 blocks totalMins = hours * 60 + minutes; tenMinBlocks = totalMins / 10; totalMins = hours * 60 + minutes; tenMinBlocks = totalMins / 10; hours = 11; minutes = 6; int hours = 2; int minutes = 14; int totalMins, tenMinBlocks; System.out.println(tenMinBlocks + " blocks"); System.out.println(tenMinBlocks + " blocks"); 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 The problem – Do same calculation three times .... public class TenMinuteBlocks { public void start() { } Repetition! 13 blocks 66 blocks 13 blocks } totalMins = hours * 60 + minutes; tenMinBlocks = totalMins / 10; totalMins = hours * 60 + minutes; tenMinBlocks = totalMins / 10; hours = 11; minutes = 6; int hours = 2; int minutes = 14; int totalMins, tenMinBlocks; System.out.println(tenMinBlocks + " blocks"); System.out.println(tenMinBlocks + " blocks"); totalMins = hours * 60 + minutes; tenMinBlocks = totalMins / 10; hours = 2; minutes = 16; System.out.println(tenMinBlocks + " blocks"); 5 1 2 3 4 5 6 7 8 9 10 public class TenMinuteBlocks { public void start() { int hours = 2; int minutes = 14; int totalMins, tenMinBlocks; totalMins = hours * 60 + minutes; tenMinBlocks = totalMins / 10; System.out.println(tenMinBlocks + " blocks"); } } The solution IdentiFy sections oF code that needs to be executed repeatedly: Put that code in a method, and call the method whenever the...
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## This note was uploaded on 03/01/2012 for the course COMPSCI 101 taught by Professor Adrianaferraro during the Summer '12 term at Auckland.

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L07 - CS101 Lecture 7 1 Computer Science 1 1 SS C Lecture 7...

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