Difference between revisions of "CSC111 Exercises with For-Loops: Repeating things"
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Given the array sound, and an integer input by the user, your program will return the location of the '''last''' occurrence of the user's number. | Given the array sound, and an integer input by the user, your program will return the location of the '''last''' occurrence of the user's number. | ||
<br /> | <br /> | ||
− | <br /><center><videoflash>XJPixDjiqeg</videoflash></center> | + | ==Possible Solution== |
+ | <br /> | ||
+ | <!--br /><center><videoflash>XJPixDjiqeg</videoflash></center--> | ||
+ | <source lang="python"> | ||
+ | sound = [1, 10, 3, 10, 3, 10, 2 ] | ||
+ | |||
+ | x = int( input( "Enter an integer: " ) ) | ||
+ | |||
+ | pos = -1 | ||
+ | for i in range( len( sound )-1, -1, -1 ): | ||
+ | if sound[i] == x: | ||
+ | pos = 1 | ||
+ | break | ||
+ | |||
+ | if pos != -1: | ||
+ | print( "Found %d at position %d" % (x, pos ) ) | ||
+ | else: | ||
+ | print( "%d not found!" %x ) | ||
+ | |||
+ | </source> | ||
<br /> | <br /> | ||
<br /> | <br /> |
Revision as of 21:07, 28 February 2014
--D. Thiebaut (talk) 10:17, 28 February 2014 (EST)
Exercise 1
Given the array sound
sound = [ 1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 9, 1, 1, 0, 0]
write a program that will ask the user for a number and will indicate if this number is in the array or not
Exercise 2
Given the array words
words = [ "hello", "there!", "there", "will", "be", "a", "big", "snow", "storm", "on", "Monday" ]
write a program that will ask the user for a word and will indicate if this word is in the array or not
Exercise 3
Same as Exercise 1, but this time the program returns the number of times the user's choice appears in the array.
Exercise 4
Given the array sound, and an integer input by the user, your program will return the location of the first occurrence of the user's number.
Exercise 5
Given the array sound, and an integer input by the user, your program will return the location of the last occurrence of the user's number.
Possible Solution
sound = [1, 10, 3, 10, 3, 10, 2 ]
x = int( input( "Enter an integer: " ) )
pos = -1
for i in range( len( sound )-1, -1, -1 ):
if sound[i] == x:
pos = 1
break
if pos != -1:
print( "Found %d at position %d" % (x, pos ) )
else:
print( "%d not found!" %x )