Sorting records in a file by specified field(s)

[swaroop]

Please any one help me in sorting records in a given file with a specified field.

Example:

LASTNAME FIRSTNAME ID JOINDATE SALARY
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Kunduru Swaroop 9234 10/10/2000 4000.00
Barrenkabavi Vishnu 2945 01/11/2000 7000.00
Junkey Naveen 2234 12/09/2000 1000.00
Chinnala Rajesh 6134 03/01/2001 5000.00
Kalyan Pavan 1234 12/27/2000 2000.00

The above records are in file Data.dat I wanted to sort by ID. Could any one help in solving this problem.

Thanx in advance.

Swaroop.

 

[Cagliostro]

You need a struct:
struct dataStr
{
string LASTNAME;
string FIRSTNAME
int ID;
string JOINDATE;
float SALARY;
};
Load file into an array of dataStr's and sort it. After it write them in correct order in your file.
John Fill

ivfmd@mail.md

 

[Pavlo]

Greetingx!

Also you may read data to early presented structure using fscanf function, like follow:

FILE *file;
char LASTNAME[20], FIRSTNAME[20],JOINDATE[10];
int ID;
float SALARY;
file = fopen("yourfile.ext","r"
fscanf(file,"%s %s %i %s %f",LASTNAME,FIRSTNAME,&ID,JOINDATE,&SALARY);
//here writing read data to dataStr structure;
fclose(file);