Go4Expert - could anybody help

hello everybody ,,
iam new in this forum and new in C++
so iam starting with problem here if anyone could help

i have file which is contain of name, ID ,Marks and i want to sort it ascending by the Marks
so i dont know how to move the names and Ids when i move the move the marks so could anybody help
""i think maybe if i use another array and use it as index or sth like this but i couldnt figure it out""

and this is my code

Code:

#include <iostream.h>

#include <fstream.h>



struct sort

{

        char names [20];

        long ids;

        int marks;

}result;

 main()

{

         int temp;

sort nafek [5],index[5];

fstream  file;

file.open("data.dat",ios::in);

for (int i=0;i<3;i++)

{



file>>nafek [i].ids>>nafek[i].marks>>nafek[i].names;







}

for (i=0;i<3;i++)

{

        for (int j=i+1;j<=3;j++)

        {

                if (nafek[j].marks<nafek[i].marks)

                {

                        temp=nafek[i].marks;

                        nafek[i].marks=nafek[j].marks;

                        nafek[j].marks=temp;

        }}

}

for (i=0;i<3;i++)

{



cout<<nafek[i].marks<<" "<< nafek[i].names<<nafek[i].ids<<'/n';

file.close();

}

        return 0;

}

and tanx :)