Answer Posted / domz tubalado

#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
void dugay(){
int x;
printf("\nLoading...");
for(x=0;x<1000;x++)
{
delay(100);
if(x%100==0)
printf(".");
}
}

/*STRUCTURE*/
struct Node{
int ID;
char name[10];
char surname[10];
char course[7];

struct Node *Link;
};
typedef struct Node *NodePointer;

/*INSERT NODE IN FRONT*/

void InsertInFront(NodePointer *Head, int iID, char iname[10]){
NodePointer NewNode;
NewNode=(NodePointer)malloc(sizeof(struct Node));

NewNode->ID=iID;
strcpy(NewNode->name,iname);
printf("ID: ");
scanf("%d",&NewNode->ID);
printf("Name: ");
scanf("%s",&iname);
printf("\n");

NewNode->Link=*Head;
*Head=NewNode;
}

/*DELETE FRONT*/
void DeleteFront(NodePointer *Head){
NodePointer Temp;
if(*Head==NULL)
printf("Link list empty...Cannot delete");
else{
Temp=*Head;
*Head=(*Head)->Link;
free(Temp);
}
}

/*SEARCHING*/
NodePointer Searching(NodePointer *Head,int Key)
{
NodePointer Here;
Here=*Head;
while (Here!=NULL)
if((Here->ID)==Key)
return (Here);
else
Here=Here->Link;
return(NULL);
}

/*INSERT END*/
void InsertAtEnd(NodePointer *Head,int Number)
{
NodePointer NewNode,Temp;
NewNode=(NodePointer)malloc(sizeof(struct Node));
NewNode->ID=Number;
printf("\nNew Node:%d",NewNode->ID);
NewNode->Link=NULL;
if(Head==NULL)
*Head=NewNode;
else
{
Temp=*Head;
while(Temp->Link!=NULL)
Temp=Temp->Link;
Temp->Link=NewNode;
}
}

/*DELETE END */
void DeleteEnd(NodePointer *Head)
{
NodePointer Before,After;
if(*Head==NULL)
printf("\nLink List is empty!...Cannot Delete");
else
{
Before=NULL;
After=*Head;
while (After->Link!=NULL)
{
Before=After;
After=After->Link;
}
if ((*Head)->Link==NULL)
Head=NULL;
else
Before->Link=NULL;
free(After);
}
}

/*INSERT BETWEEN*/
void InsertInBetween(NodePointer Before, NodePointer After,
int Number)
{
NodePointer NewNode;
NewNode=(NodePointer)malloc(sizeof(struct Node));
NewNode->Link=NULL;
NewNode->ID=Number;
NewNode->Link=After;
Before->Link=NewNode;
}

/*DELETE BETWEEN*/
void DeleteInBetween(NodePointer Discard, NodePointer Before)
{
(Before)->Link=(Discard)->Link;
free(Discard);
}

/*DISPLAY NODES*/
void display(NodePointer *Head)
{
NodePointer current;
int row=3;
clrscr();
gotoxy(35,1);printf("LINK LIST");
printf("\n MENU");
printf("\n1.Insert record in front.");
printf("\n2.Insert record at the end.");
printf("\n3.Insert in between.");
printf("\n4.Search node record.");
printf("\n5.Delete record in front.");
printf("\n6.Delete record at the end.");
printf("\n7.Delete record in between.");
current=*Head;
gotoxy(52,2);printf("ID NUMBERS");
while(current!=NULL)
{
gotoxy(48,row);printf("Registered ID:%d",current->ID);
current=current->Link;
row++;
}
}

/*MAIN PROGRAM*/
void main(){
NodePointer Head=NULL,current;
NodePointer After,Before,Discard;
int x=0,node=0,data;
char y,select,zname;
do{
display(&Head);
gotoxy(1,10);
printf("\n\nSELECT MENU");
fflush(stdin);
scanf("%c",&select);
switch(select){
case '1':printf("No. of nodes to be inserted in front:");
fflush(stdin);
scanf("%d",&node);
for(x=1;x<=node;x++)
InsertInFront(&Head,x,zname);
dugay();
display(&Head);
break;
case '2':printf("No of nodes to be inserted at end:");
fflush(stdin);
scanf("%d",&node);
for(x=1;x<=node;x++)
InsertAtEnd(&Head,x);
dugay();
display(&Head);
break;
case '3':printf("Node Before:");
scanf("%d",&node);
Before=Searching(&Head,node);
printf("\nNode After:");
scanf("%d",&node);
After=Searching(&Head,node);
printf("\nNumber data to be inserted:");
scanf("%d",&data);
InsertInBetween(Before,After,data);
dugay();
display(&Head);
break;
case '4':printf("Input data to be searched:");
fflush(stdin);
scanf("%d",&node);
current=Searching(&Head,node);
printf("\nFound data:%d",current->ID);
dugay();
display(&Head);
break;
case '5':printf("No. of nodes to be deleted in front of
the head:");
fflush(stdin);
scanf("%d",&node);
for(x=1;x<=node;x++)
DeleteFront(&Head);
dugay();
display(&Head);
break;
case '6':printf("No. of nodes to be deleted at the end:");
fflush(stdin);
scanf("%d",&node);
for(x=1;x<=node;x++)
DeleteEnd(&Head);
dugay();
display(&Head);
break;
case '7':printf("Node no. before the node no. to be
deleted:");
printf("%d",&node);
Before=Searching(&Head,node);
printf("\nInput node to be deleted:");
scanf("%d",&node);
Discard=Searching(&Head,node);
DeleteInBetween(Discard,Before);
dugay();
display(&Head);
break;
default:
printf("Invalid Selection...");
}

gotoxy(28,20);printf("Want to continue?[y/n]:");
fflush(stdin);
scanf("%c",&y);
}while(toupper(y)!='N');
}

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