Please send a sollution to this . I have a csv file named file.csv. I need to read that using array and then sort them based on the column. please can you help in the sorting technique.

here is my code

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main()
{
   struct{
             char name[10];
             char code[10];
             char designation[10];
             char gender[10];
            } employee_details[15];

       FILE *fp;
       char buf[50];
       int i=0,j;
       fp=fopen("file.csv","r");
       while(fgets(buf,sizeof(buf),fp)!=NULL)
        {
             strcpy(employee_details[i].name,strtok(buf,","));
             strcpy(employee_details[i].code,strtok(buf,","));
             strcpy(employee_details[i].designation,strtok(buf,","));
             strcpy(employee_details[i].gender,strtok(buf,","));
             ++i;
        }
        for(j=0;j<10;j++)
         {
            printf("employee:%s","employee_details[j]);

          }
        fclose (fp);
}

I am new to the concept of C programming. So please can you guide me regarding the sorting for each of the column .

do you know how to code bubble sort? or any other sorting algorithm ? If yes, then sorting structures is nearly the same thing except instead of swapping integers you swap whole structures. But it runs a lot faster if you use an array of pointers to structures instead of an array of structures because all you have to swap are the pointers.

Hi thank you for providing the sollution. I know bubble sort and i have applied the method too. but dont know in terms of array of pointers. i know only this way,since I dont have much knowledge of pointers.

void sort(int arr[],int size)
{
  int temp,i,j;
   for (i=0;i<size;i++)
   {   
     for(j=0;j<size-i-1;j++)
    {  
        if (arr[j]<arr[j+1])
        {
            temp=arr[j];
            arr[j]=arr[j+1];
            arr[j+1]=temp;
         }
     }
  }
}

pretty simple -- just replace the array of ints with an array of structures and make temp a structure data type instead of int.

Not sure where you got that algorith, but its a little off -- the inner loop should run from i+1 to size. I think the below will run slightly faster because fewer iterations.

void sort(int arr[],int size)
{
  int temp,i,j;
   for (i=0;i<size-1;i++)
   {   
     for(j=i+1;j<size;j++)
    {  
        if (arr[i]<arr[j])
        {
            temp=arr[i];
            arr[i]=arr[j];
            arr[j]=temp;
         }
     }
  }
}
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