sorting infos from a file

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how can ı sort a student list from a text file like StudentList.txt according to students' surname and id number.can ypu help me?

Posted 20-Dec-09 2:44am

merturk

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Viswa Teja · Answer 1 · 2009-12-20T03:54:00

Do it in this way.. Read the file using File I/O Strems and then when you display the student information on screan you sort it.. For it you need to read the file into two string variables for this you have to use read method that reads only till a space or end of line occurs and then in a for loop or while loop read the file save the the first line into the first variable and second line in second variable. compare the values using stringcompartion method then save it into an array in sorted way. then You display the whole array. Its Like Sorting tecnique(Buble sort etc)...
You better Sort by Student ID. It is the perfect way.

Viswa Teja · Answer 2 · 2009-12-20T04:01:00

Solution 2

Actualy i am an c#.net Student but i too had the same doubt i have asked my faculty they gave me the sample in c#.

Posted 20-Dec-09 4:01am

Viswa Teja

Oakman · Answer 3 · 2009-12-20T04:39:00

This'll hand the id number as it, then adapt it to use the ascii value of the surname array.

<<integer array="" sort="">>=
static void bubble_sort( int[] array )
{
long right_border = array.Length - 1;

do
{
long last_exchange = 0;

for (long i = 0; i < right_border; i++)
{
if (array[i] > array[i + 1])
{
int temp = array[i];
array[i] = array[i + 1];
array[i + 1] = temp;

last_exchange = i;
}
}

right_border = last_exchange;
}
while (right_border > 0);
}

merturk · Answer 4 · 2009-12-20T04:44:00

Solution 6

hi oakman firstly thank you for your answer but ı cannot do take list of students from file..other parts are difficult for me but i think if ı try ı can do but dont now how ı can take from file the list...

Posted 20-Dec-09 4:44am

merturk

Christian Graus · Answer 5 · 2009-12-20T10:27:00

Solution 7

The most logical way to do this, is to create a student class, read your students into it ( with the iostream extension code I linked to for you ), and then write a function object that sorts however you like, so you can create a vector of students and use the STL:sort methods on it.

Posted 20-Dec-09 10:27am

Christian Graus