Teaching%20Session%206

# Teaching%20Session%206 - Engineering 1D04 Teaching Session...

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Engineering 1D04 Teaching Session 6

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© Copyright 2006 David Das, Ryan Lortie, Alan Wassyng 1 Records square4 So far we've seen a number of different types of variables: circle4 Integers (int) circle4 Strings (string) circle4 Floating Point Numbers (float, double) circle4 Boolean Values (bool)
© Copyright 2006 David Das, Ryan Lortie, Alan Wassyng 2 Records square4 In many cases, we have a need to represent data more complex than a single number or a text string.

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© Copyright 2006 David Das, Ryan Lortie, Alan Wassyng 3 Alice Eve Bob Charlie A string An array containing 4 strings 7000 5000 4000 2000 An integer An array containing 4 integers 3 2 1 0 3 2 1 0 High Scores square4 Recall the high score system. circle4 We used two separate arrays to store the following items: The top ten scores The names associated with those scores
© Copyright 2006 David Das, Ryan Lortie, Alan Wassyng 4 for (j = names.Length - 1; j > i; j--) names[j] = names[j-1]; scores[j] = scores[j-1]; names[i] = name; scores[i] = score; Alice Eve Bob Charlie 7000 5000 4000 2000 New score to be inserted here j 1 i Dave 6000 3 2 1 0 3 2 1 0 High Scores

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© Copyright 2006 David Das, Ryan Lortie, Alan Wassyng 5 Alice Eve Bob Charlie 7000 5000 4000 2000 New score to be inserted here j 1 i Dave 6000 Before starting, notice that Eve's score is 5000. 3 2 1 0 3 2 1 0 High Scores for (j = names.Length - 1; j > i; j--) names[j] = names[j-1]; scores[j] = scores[j-1]; names[i] = name; scores[i] = score;
© Copyright 2006 David Das, Ryan Lortie, Alan Wassyng 6 for (j = names.Length - 1; j > i; j--) names[j] = names[j-1]; scores[j] = scores[j-1]; names[i] = name; scores[i] = score; Alice Eve Bob Charlie 7000 5000 4000 2000 New score to be inserted here 3 j 1 i Dave 6000 3 2 1 0 3 2 1 0 High Scores

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© Copyright 2006 David Das, Ryan Lortie, Alan Wassyng 7 for (j = names.Length - 1; j > i; j--) names[j] = names[j-1]; scores[j] = scores[j-1]; names[i] = name; scores[i] = score; Alice Eve Bob Bob 7000 5000 4000 2000 New score to be inserted here 3 j 1 i Name moves Dave 6000 3 2 1 0 3 2 1 0 High Scores
© Copyright 2006 David Das, Ryan Lortie, Alan Wassyng 8 for (j = names.Length - 1; j > i; j--) names[j] = names[j-1]; scores[j] = scores[j-1]; names[i] = name; scores[i] = score; Alice Eve Bob Bob 7000 5000 4000 2000 New score to be inserted here 2 j 1 i Name moves but score does not! Dave 6000 3 2 1 0 3 2 1 0 High Scores

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© Copyright 2006 David Das, Ryan Lortie, Alan Wassyng 9 for (j = names.Length - 1; j > i; j--) names[j] = names[j-1]; scores[j] = scores[j-1]; names[i] = name; scores[i] = score; Alice Eve Eve Bob 7000 5000 4000 2000 New score to be inserted here 2 j 1 i Dave 6000 3 2 1 0 3 2 1 0 High Scores Name moves but score does not!
© Copyright 2006 David Das, Ryan Lortie, Alan Wassyng 10 for (j = names.Length - 1; j > i; j--) names[j] = names[j-1]; scores[j] = scores[j-1]; names[i] = name; scores[i] = score; Alice Eve Eve Bob 7000 5000 4000 2000 New score to be inserted here 1 j 1 i No longer true Dave 6000 3 2 1 0 3 2 1 0 High Scores

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© Copyright 2006 David Das, Ryan Lortie, Alan Wassyng 11 for (j = names.Length - 1; j > i; j--) names[j] = names[j-1]; scores[j] = scores[j-1]; names[i] = name; scores[i] = score; Alice Eve Eve Bob 7000 7000 4000 2000 New score to be inserted here 1 j 1 i Dave 6000 ???
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