Hi all,
I have the following problem. Suppose I write an app which gets input in a text file(i.txt) some sport records for each athlete. The file is like

<numofathlete> <time(s)>
<numofathlete> <time(s)>
...etc
Now how can I write an app which thakes all this output, sorts it and writes to an another file, o.txt the 5 best athletes, beginning with the 1st.

Please help!

Hi buddy, for this you can use stdio.h or fstream.h. i am telling you the thing using fstream.h
Just include fstream.h and declare a object of fstream class for file operations.

include <fstream.h>

int main()
{
char name[10];
int time;
fstream file; // this will make a fstream object to read/write file.

file.open("c:\\i.txt","rb"); // this will open a file in rb mode (read-binary).
file>>name; // this will read a word form the file
file>>time; // this will read the time from file
file.close(); // this will close file.

// then do your operations.

file.open("c:\\o.txt","wb"); // this will open a file in wb mode (write-binary).
file<<name; // this will write the sting stored in "name" into file.
file<<" "; // this will insert space in the file after the name.
file<<time; // this will write the value of variable "time" into file.
file<<"endl"; // this will move to next line of the file.
file.close();
}


you can use bubble sort to sort the players. and to read all the records in the file put them in a loop and store the names in a 2-D array of strings. The loop will run like this.

while (!file.eof()) // will run until eof() or End of File


Hope this will help u.

Thank you, i also use C++ and there should be a similar way in C? But because I'm a newb, any C advice?

Ok if you are using C, you have to do something like.

include<stdio.h>


int main()
{
char name[10];
int time;

FILE *ptr; // pointer to the file.

ptr=fopen("c:\\i.txt","rb"); // Opens the file for reading
fread(name,sizeof(name),1,ptr); // reads 10 chars from file.
fread(&time,sizeof(time),1,ptr); // reads integer from file.
fclose(ptr);


//similarly to write the file open the file in writing mode like


ptr=fopen("c:\\o.txt","wb");

fwrite(name,sizeof(name),1,ptr);
fwrite(&time,sizeof(name),1,ptr);
fclsoe(ptr);
}


to loop until end of file you can use

while(!feof(ptr))

but in this kind of filing when you store the records in the file all record must be of same length, Like in this case all names must be of 10 char, not less not more. Even if you have some name like "jhon" you will write it as "jhon " to make it 10 char long.

Thanks very much!