C language Single linked list of the establishment, find, add, delete, modify the function to achieve

This program is my Learning single linked list of the time to write code, so not complete, I hope that you understand the list of the time to play a little help, and welcome all students to discuss technology, to technology to make friends all over the world. I QQ number: 648422746

#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <stdlib.h>
#definelen (structstaff*) malloc (sizeof (STRUCTSTAFF))
Structstaff
{
CHARNAME[10];
Intsalary;
Structstaff*next;
};
Structstaff*creat ();
Voidprint (structstaff*);
Structstaff*find (structstaff*);
Structstaff*addmessage (structstaff*);
Structstaff*deletemessage (structstaff*);
Structstaff*changemessage (structstaff*);
Main ()
{
Structstaff*head,*p;
Head=creat ();
Print (head);
P=find (head);
Head=addmessage (head);
Head=deletemessage (head);
Head=changemessage (head);
}

Structstaff*creat ()
{
STRUCTSTAFF*HEAD,*P1,*P2;
INTN;
n=0;
Head=null;
P1=len;
printf ("/n) Please type the student's information (including first name, score):/n");
scanf ("%s%d", p1->name,&p1->salary);
while (p1->salary>0)
{
n++;
if (n==1)
HEAD=P1;
Else
p2->next=p1;
P2=P1;
P1=len;
scanf ("/n%s%d", p1->name,&p1->salary);

}
p2->next=null;
Returnhead;
}
Voidprint (Structstaff*head)
{
Structstaff*p;
P=head;

while (P!=null)
{
printf ("/n%s%d", p->name,p->salary);
p=p->next;
}
}
Structstaff*find (Structstaff*head)
{
STRUCTSTAFF*P1;
CHARFINDNAME[10];
P1=head;
printf ("/npleaseinputyoufindname:/n");
scanf ("%s", FindName);
while (P1!=null)
{
if (strcmp (findname,p1->name) ==0)
{
printf ("/n%s%d", p1->name,p1->salary);
RETURNP1;
}
Else
p1=p1->next;
}
if (p1=null)
printf ("/n does not have the information/n for the student you are looking for");
}
Structstaff*addmessage (Structstaff*head)
{
STRUCTSTAFF*P1,*P2;
P1=head;
P2=head;
P1=len;
printf ("N/a Please enter the information you want to add:/n");
scanf ("/n%s%d", p1->name,&p1->salary);
if (head!=null)
{
P2=head;
p1->next=p2;
HEAD=P1;
}
Else
HEAD=P1;
Print (head);
Returnhead;
}
Structstaff*deletemessage (Structstaff*head)
{
STRUCTSTAFF*P1,*P2;
CHARDELETENAME[10];
P1=head;
P2=head;
printf ("/n Delete student's information, type the student's name:/n");
scanf ("%s", deletename);
while (strcmp (deletename,p1->name)!=0)
{
P2=P1;
p1=p1->next;
}
if (strcmp (head->name,p1->name) ==0)
{
head=p1->next;
}
ElseIf (strcmp (deletename,p1->name) ==0)
{
p2->next=p1->next;
}
Free (p1);
Print (head);
Returnhead;
}
Structstaff*changemessage (Structstaff*head)
{
Structstaff*p;
CHARCHANGENAME[10];
P=head;
printf ("/n Modify the student's information, type the student's name:");
scanf ("%s", changename);
while (strcmp (changename,p->name)!=0)
{
p=p->next;
}
printf ("/n the student's information is:%s%d", p->name,p->salary);
printf ("/n please retype the student's information including name, Score:");
scanf ("%s%d", p->name,&p->salary);
printf ("/N All students ' information is as follows:/n");
Print (head);

}