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infile into array and sort
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Join Date: Jun 2007
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The following is my "inFile":
The question is: Write a program that will read an unknown number of single names (of jumbled letters) into an array from a file named “listnames.txt”. There are no more than 120 names in the list. Sort the names in normal alphabetical order and then display them to the screen and print printer in 5 columns.
Any assistance is appreciated...The following (below) is what I have so far....but I want to make sure.....a couple things:
1st. The program keeps repeating the the groups of letters on the first line..why does it not read in the data from each line?
2nd. For right now..the program won't run....is it because of how I have my string 'names' declared? I pretty much want the program to read from the 'inFile' into an array..is my declaration ok?
3. I'm kinna familiar with BubbleSort...but only for numeric values... how can I sort the names in normal alphabetical order.
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Any assistance is appreciated...The following (below) is what I have so far....but I want to make sure.....a couple things:
1st. The program keeps repeating the the groups of letters on the first line..why does it not read in the data from each line?
2nd. For right now..the program won't run....is it because of how I have my string 'names' declared? I pretty much want the program to read from the 'inFile' into an array..is my declaration ok?
3. I'm kinna familiar with BubbleSort...but only for numeric values... how can I sort the names in normal alphabetical order.
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Join Date: Dec 2005
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Perhaps output names[ i ], not names[ 120 ]
You also need a loop to input them as well, you can't just read the whole lot like that.
You also need a loop to input them as well, you can't just read the whole lot like that.
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Thanks much Salem....waht about the sorting of the names in normal alphabetical order?
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Dunno - are you allowed to use the library sort, or are you expected to implement it yourself?
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Our professor simply wnet over the Bubble-sort, but he didn't specify what kinna sorts we were suppose to use..To be honest...I always thought Bubble sorts were for numbers...because you could always compare the values...but I have no clue about how to do it for letters. Thanks for you input.
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You can use any sort on any data which has the < operator defined.
Can you do for example
If you can, you can sort them.
Can you do for example
names[ i ] < names[ i + 1 ]If you can, you can sort them.
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>.waht about the sorting of the names in normal alphabetical order?
[search]c++ bubble sort[/search]
[search]c++ bubble sort[/search]
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>but I have no clue about how to do it for letters
string a ="apple";
string b ="banana";
if (a > b )
{
//do stuff
}
string a ="apple";
string b ="banana";
if (a > b )
{
//do stuff
}
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string a ="apple";
string b ="banana";
if (a > b )
{
//do stuff
}
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>>so considering the fact, that each line in the inFile contains all leters of the alphabeth, at some point or the other....i'd have to use a lot of if-else statements? For example... if (x>y)...all the way down?
Naw -- it is not that hard. What jamthwee posted was just an example to show you how to compare two strings. Since you have them in an array you can use a loop to run through them exactly like you would sort an array of integers. Like this bubble sort algorithm -- there are other more efficient sort algorithms, but this is ok for small arrays.
Naw -- it is not that hard. What jamthwee posted was just an example to show you how to compare two strings. Since you have them in an array you can use a loop to run through them exactly like you would sort an array of integers. Like this bubble sort algorithm -- there are other more efficient sort algorithms, but this is ok for small arrays.
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Last edited by Ancient Dragon; Sep 23rd, 2007 at 2:36 am.
Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.
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