Question
In: Computer Science
Allow the InsertAt method to add to the front position 0 (zero) also if you try...
Allow the InsertAt method to add to the front position 0 (zero)
also if you try to add to a position greater than the number of nodes you get an error warning.
Please do through this order. Thanks
--> I need you to add more than 2 front position.
// 1 LOAD THE LIST FROM DATA.BIN //buildlist
// 2 DISPLAY THE LIST //prntlist
// 3 ADD TO THE LIST // listinsert
// 4 DELETE FROM THE LIST // listdelete
// 5 EXIT
//INSERT.C
/*THIS PROGRAM READS A BINARY FILE (MUST ALREADY EXIST AND BE FILLED) */
/*AND PUTS IT INTO A LINKED LIST AND PRINTS THE LIST TO THE SCREEN) */
#include
#include
#include
#include
#include
typedef struct ENTRY
{
char name[81];
}ENTRY;
typedef struct LISTREC /* LISTREC is a user-defined type, defined */
{ /* before main so it will be global */
struct ENTRY info; /* info nests all fields contained in */
struct LISTREC *link; /* ENTRY (above). */
}LISTREC; /* link is a pointer variable to another */
/* type LISTREC. NOTE: Name of type MUST */
/* be entered at end of typedef */
FILE *stream;
ENTRY part;
//prototypes !!!!
void listdelete(ENTRY part,LISTREC *liststart);
LISTREC *buildlist();
void prntlist(LISTREC *);
void listinsert(ENTRY,LISTREC *);
LISTREC * InsertAt(LISTREC *, ENTRY ,int );
void main()
{
LISTREC *liststart; /*holds a pointer to beginning of list*/
stream=fopen("data.bin","r+b");
liststart = buildlist(); /*buildlist is a function which will*/
// clrscr(); /*return the beginning of the list*/
printf("Before insertion linked list:\n");
prntlist(liststart);
printf("Enter name to insert:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
listinsert(part,liststart);
prntlist(liststart);
printf("Before deletion linked list:\n");
prntlist(liststart);
printf("Enter name to delete:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
listdelete(part,liststart);
prntlist(liststart);
printf("Enter name to insert:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
liststart=InsertAt(liststart,part,3);
prntlist(liststart);
printf("Enter name to insert:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
liststart=InsertAt(liststart,part,6);
prntlist(liststart);
printf("Enter name to insert:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
liststart=InsertAt(liststart,part,7);
prntlist(liststart);
/* printf("Enter name to insert:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
liststart=InsertAt(liststart,part,0);
prntlist(liststart);
*/
// does doesn't work but throws no error !!!!!!
printf("Enter name to insert:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
liststart=InsertAt(liststart,part,22);
prntlist(liststart);
}//main
/*****************FUNCTION LISTINSERT**********************/
void listinsert(ENTRY newentry,LISTREC *liststart)
{
LISTREC *last,*next;
next = liststart;
while ((strcmp(newentry.name,next->info.name)> 0) && (next->link != NULL))
{
last = next;
next = next->link;
} /*end while*/
if (strcmp(newentry.name,next->info.name) == 0) /*if both are same*/
next->info = newentry; /*updates*/
else
if (strcmp(newentry.name,next->info.name) < 0)
{
last->link = (LISTREC*)malloc(sizeof(LISTREC)); /*creates new node*/
last->link->info=newentry;
last->link->link = next;
}
else
{
next->link = (LISTREC*)malloc(sizeof(LISTREC));
next->link->info = newentry;
next->link->link = NULL;
} /* end else */
printf("\n\nAfter insertion, linked list:\n");
prntlist(liststart);
} /* end function listinsert*/
/**************FUNCTION BUILDLIST************************/
LISTREC *buildlist() /* Function buildlist returns type LISTREC.*/
{ /* It takes no arguments */
LISTREC *liststart = NULL;
/*of type LISTREC */
int n; /*Needed to test for end of file*/
//CREATE A DUMMY NODE !!!!
liststart=(LISTREC *)malloc(sizeof(LISTREC));
liststart->info.name[0]='\0';
liststart->link=NULL;
for (;;)
{ /*begin for*/ /*for will keep looping until breaks at end of file*/
n= fread(&part,sizeof(part),1,stream);
if (n==0) break;
listinsert(part,liststart);
} /*end for*/
return(liststart);
} /*end Function buildlist*/
/****************FUNCTION PRNTLIST********************/
void prntlist(LISTREC *liststart)
/*argument is a pointer to type LISTREC*/
{ /*begin function*/
while (liststart != NULL)
{ /*begin while*/
printf("%s\n",liststart->info.name);
liststart = liststart->link;
} /*end while*/
} /* end function prntlist*/
/*****************FUNCTION LISTDELETE**********************/
void listdelete(ENTRY part,LISTREC *liststart)
{
LISTREC *last,*next;
next = liststart;
while ((strcmp(part.name,next->info.name)!=0) && (next->link != NULL))
{
last = next;
next = next->link;
} /*end while*/
if (strcmp(part.name,next->info.name) == 0) /*if both are same*/
{
last->link=next->link; /*updates*/
free(next);
}
printf("\n\nAfter deletion, linked list:\n");
prntlist(liststart);
} /* end function listdelete*/
LISTREC * InsertAt(LISTREC *liststart, ENTRY newentry,int n)
{
int i = 0;
//LISTREC * liststart;
LISTREC * last = NULL;
LISTREC * next = liststart;
if (liststart == NULL)
{
liststart = (LISTREC*)malloc(sizeof(LISTREC)); /*creates new node*/
liststart->info=newentry;
liststart->link = NULL;
printf("\n Created node at %d",i);
}//if
else while ((next->link != NULL) && (i != n))
{
last = next;
next = next->link;
++i;
}//else while
if (next == NULL)
{
next = (LISTREC*)malloc(sizeof(LISTREC)); /*creates new node*/
next->info=newentry;
next->link = NULL;
printf("\n Created node at %d",i);
}//if
else if (i==n)
{
last->link = (LISTREC*)malloc(sizeof(LISTREC)); /*creates new node*/
last->link->info=newentry;
last->link->link = next;
printf("\n Created node at %d",i);
}//else
return liststart;
}// insertAT
Solutions
Expert Solution
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
typedef struct ENTRY
{
char name[81];
}ENTRY;
typedef struct LISTREC /* LISTREC is a user-defined type, defined */
{ /* before main so it will be global */
struct ENTRY info; /* info nests all fields contained in */
struct LISTREC *link; /* ENTRY (above). */
}LISTREC; /* link is a pointer variable to another */
/* type LISTREC. NOTE: Name of type MUST */
/* be entered at end of typedef */
FILE *stream;
ENTRY part;
//prototypes !!!!
void listdelete(ENTRY part,LISTREC *liststart);
LISTREC *buildlist();
void prntlist(LISTREC *);
void listinsert(ENTRY,LISTREC *);
LISTREC * InsertAt(LISTREC *, ENTRY ,int );
int main()
{
LISTREC *liststart; /*holds a pointer to beginning of list*/
stream=fopen("data.bin","r+b");
liststart = buildlist(); /*buildlist is a function which will*/
// clrscr(); /*return the beginning of the list*/
printf("Before insertion linked list:\n");
prntlist(liststart);
printf("Enter name to insert:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
listinsert(part,liststart);
prntlist(liststart);
printf("Before deletion linked list:\n");
prntlist(liststart);
printf("Enter name to delete:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
listdelete(part,liststart);
prntlist(liststart);
printf("Enter name to insert:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
liststart=InsertAt(liststart,part,3);
prntlist(liststart);
printf("Enter name to insert:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
liststart=InsertAt(liststart,part,6);
prntlist(liststart);
printf("Enter name to insert:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
liststart=InsertAt(liststart,part,7);
prntlist(liststart);
//inserted the nodes three times at the beginning of list
printf("Enter name to insert:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
liststart=InsertAt(liststart,part,0);
prntlist(liststart);
printf("Enter name to insert:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
liststart=InsertAt(liststart,part,0);
prntlist(liststart);
printf("Enter name to insert:");
scanf(" %[^\n]",part.name);
printf("part.name = %s\n",part.name);
liststart=InsertAt(liststart,part,0);
prntlist(liststart);
}//main
/*****************FUNCTION LISTINSERT**********************/
void listinsert(ENTRY newentry,LISTREC *liststart)
{
LISTREC *last,*next;
next = liststart;
while ((strcmp(newentry.name,next->info.name)> 0) && (next->link != NULL))
{
last = next;
next = next->link;
} /*end while*/
if (strcmp(newentry.name,next->info.name) == 0) /*if both are same*/
next->info = newentry; /*updates*/
else if (strcmp(newentry.name,next->info.name) < 0)
{
last->link = (LISTREC*)malloc(sizeof(LISTREC)); /*creates new node*/
last->link->info=newentry;
last->link->link = next;
}
else
{
next->link = (LISTREC*)malloc(sizeof(LISTREC));
next->link->info = newentry;
next->link->link = NULL;
} /* end else */
printf("\n\nAfter insertion, linked list:\n");
prntlist(liststart);
} /* end function listinsert*/
/**************FUNCTION BUILDLIST************************/
LISTREC *buildlist() /* Function buildlist returns type LISTREC.*/
{ /* It takes no arguments */
LISTREC *liststart = NULL;
/*of type LISTREC */
int n; /*Needed to test for end of file*/
//CREATE A DUMMY NODE !!!!
liststart=(LISTREC *)malloc(sizeof(LISTREC));
liststart->info.name[0]='\0';
liststart->link=NULL;
for (;;)
{ /*begin for*/ /*for will keep looping until breaks at end of file*/
n= fread(&part,sizeof(part),1,stream);
if (n==0) break;
listinsert(part,liststart);
} /*end for*/
return(liststart);
} /*end Function buildlist*/
/****************FUNCTION PRNTLIST********************/
void prntlist(LISTREC *liststart)
/*argument is a pointer to type LISTREC*/
{ /*begin function*/
while (liststart != NULL)
{ /*begin while*/
printf("%s\n",liststart->info.name);
liststart = liststart->link;
} /*end while*/
} /* end function prntlist*/
/*****************FUNCTION LISTDELETE**********************/
void listdelete(ENTRY part,LISTREC *liststart)
{
LISTREC *last,*next;
next = liststart;
while ((strcmp(part.name,next->info.name)!=0) && (next->link != NULL))
{
last = next;
next = next->link;
} /*end while*/
if (strcmp(part.name,next->info.name) == 0) /*if both are same*/
{
last->link=next->link; /*updates*/
free(next);
}
printf("\n\nAfter deletion, linked list:\n");
prntlist(liststart);
} /* end function listdelete*/
LISTREC * InsertAt(LISTREC *liststart, ENTRY newentry,int n)
{
int i = 0;
//LISTREC * liststart;
LISTREC * last = NULL;
LISTREC * next = liststart;
if (liststart == NULL)
{
liststart = (LISTREC*)malloc(sizeof(LISTREC)); /*creates new node*/
liststart->info=newentry;
liststart->link = NULL;
printf("\n Created node at %d",i);
}//if
else
while ((next->link != NULL) && (i != n))
{
last = next;
next = next->link;
++i;
}//else while
if(n==0)
{
next = (LISTREC*)malloc(sizeof(LISTREC)); /*creates new node*/
next->info=newentry;
next->link =liststart;
liststart=next;
printf("\n Created node at %d",i);
}
else if (next == NULL)
{
next = (LISTREC*)malloc(sizeof(LISTREC)); /*creates new node*/
next->info=newentry;
next->link = NULL;
printf("\n Created node at %d",i);
}//if
else if (i==n)
{
last->link = (LISTREC*)malloc(sizeof(LISTREC)); /*creates new node*/
last->link->info=newentry;
last->link->link = next;
printf("\n Created node at %d",i);
}//else
return liststart;
}// insertAt
I solved the problem adding node at 0 more than 2 times
Output
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