work.h

#ifndef WORK_H
#define WORK_H
#include<string.h>
//declaration header
struct employee
{

	int id;
	int index;
	float salary;
	char empname[30];
  struct employee *next;
};
extern int c;
extern struct employee * head;
void sort(int a1);
void create()
{ ++c;
  struct employee *a=(struct employee*)malloc(sizeof(struct employee));
  struct employee *tmp=(struct employee*)malloc(sizeof(struct employee));
  char empname[30];int ld;float salary;
  printf("\nID:");
  scanf("%d",&ld);
  printf("\nEmployee Salary:");
  scanf("%f",&salary);
  printf("\nEmployee name:");
  scanf("%s",empname);
 if(head==NULL)
 {
 
  head=(struct employee*)malloc(sizeof(struct employee));
  head->id=ld;
  head->salary=salary;
  strcpy(head->empname,empname); 
  head->index=c;
  head->next=NULL; 
}
else
{tmp=head;
 a->id=ld;
 a->salary=salary;
 strcpy(a->empname,empname); 
 a->index=c;
 a->next=NULL;
 while(tmp->next!=NULL)
 {tmp=tmp->next;	
 }	
 tmp->next=a;
}
printf("\nDetails created");
sort();
}
void sort(int a1)
{int c,up=1,choice; 
struct employee *a=(struct employee*)malloc(sizeof(struct employee));
struct employee *b=(struct employee*)malloc(sizeof(struct employee));
b=head;
 if(a1!=1){
 printf("Enter the sort field:\n1.Name\n2.Id\n Your choice:");
 scanf("%d",&choice);
 switch(choice)
	 {case 1:b=head;
		 while(b!=NULL)
                 {   a=b->next;
	(a!=NULL)
		  
	{
		if(strcmp(b->empname,a->empname)>0)
		{c=b->id;
		 b->id=a->id;
		 a->id=c;
		}
		a=a->next;
	}

        b->index=up++;
        b=b->next;
}
	          break;
	  case 2:b=head;
		  while(b!=NULL)
         {   a=b->next;
	while(a!=NULL)
	{
		if((b->id)>(a->id))
		{c=b->id;
		 b->id=a->id;
		 a->id=c;
		}
		a=a->next;
	}

        b->index=up++;
        b=b->next;
}
break;
	  
 }
 
 }
 

 else
	 {b=head;
		 while(b!=NULL)
         {   a=b->next;
	while(a!=NULL)
	{
		if((b->id)>(a->id))
		{c=b->id;
		 b->id=a->id;
		 a->id=c;
		}
		a=a->next;
	}

        b->index=up++;
        b=b->next;
}
	 }
	
}
#endif