Data Structures

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SIMPLE ADDRESS BOOK (c program)

#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include<alloc.h>
#include<string.h>
#include<graphics.h>
struct entry
{
char name[50];
char nick[50];
char email[50];
char address[50];
char city[50];
char cont[50];
char pin[50];
struct entry *lptr;
struct entry *rptr;
}*temp,*newe,*l,*r;
typedef struct entry *list;
void newentry();
void display(char n[50]);
void deletentry(char n[50]);
void displayall();
void makempty();
int isempty();
void saventry();
void loadentry();
void deleteall();
void newentry()
{
char a[50],b[50],f[50],g[50],c[50],d[50],e[50];
int i,k=0;
printf("Enter the Datas for the New Entry:
");
printf("Name :");
scanf("%s",a);
printf("Nick name :");
scanf("%s",b);
printf("E-mail ID :");
scanf("%s",c);
printf("Address :");
scanf("%s",d);
printf("City :");
scanf("%s",e);
printf("Contact No:");
scanf("%s",f);
printf("Pincode :");
scanf("%s",g);
newe=(struct entry*)malloc(sizeof(struct entry));
for(i=0;i<50;i++)
{
newe->name[i]=' ';
newe->nick[i]=' ';
newe->email[i]=' ';
newe->address[i]=' ';
newe->city[i]=' ';
newe->cont[i]=' ';
newe->pin[i]=' ';
}
for(i=0;i<50;i++)
{
newe->name[i]=a[i];
newe->nick[i]=b[i];
newe->email[i]=c[i];
newe->address[i]=d[i];
newe->city[i]=e[i];
newe->cont[i]=f[i];
newe->pin[i]=g[i];
}
if(isempty())
{
newe->lptr=newe->rptr=NULL;
l=r=newe;
printf("Your Entry is Added
");
}
else
{
temp=l;
while(temp!=NULL)
{
i=stricmp(newe->name,temp->name);
if(i<0)
break;
else if(i>0)
temp=temp->rptr;
else if(i==0)
{
printf("Name Already Exists.Entry cannot be Added
");
k=1;
break;
}
}
if(k!=1)
{
if(temp==l)
{
newe->lptr=NULL;
newe->rptr=l;
l->lptr=newe;
l=newe;
printf("Your Entry is Added
");
}
else if(temp==NULL)
{
newe->rptr=NULL;
newe->lptr=r;
r->rptr=newe;
r=newe;
printf("Your Entry is Added
");
}
else
{
newe->rptr=temp;
newe->lptr=temp->lptr;
temp->lptr=newe;
(newe->lptr)->rptr=newe;
printf("Your Entry is Added
");
}
}
}
}

void displayall()
{ int n=1;
if(!isempty())
{
temp=l;
while(temp!=NULL)
{
printf("[%d] Name :%s
Nick Name :%s
E-mail ID
:%s
address
:%s
City :%s
Contact.No:%s
Pin code
:%s

",n,temp->name,temp->nick,temp->email,temp->address,temp->city,temp
->cont,temp->pin);
temp=temp->rptr;
n++;
}
}
else
printf("Address Book is Empty
");
}

void deletentry(char n[50])
{
int i;
if(isempty())
printf("Address Book is Empty
");
else{
temp=l;
while(temp!=NULL)
{
i=stricmp(temp->name,n);
if(i==NULL)
{
if(l==r)
{
l=r=NULL;
printf("Entry deleted
");
break;
}
else if(temp==l)
{
l=l->rptr;
l->lptr=NULL;
printf("Entry deleted
");
break;
}
else if(temp==r)
{
r=r->lptr;
r->rptr=NULL;
printf("Entry deleted
");
break;
}
else{
(temp->lptr)->rptr=temp->rptr;
(temp->rptr)->lptr=temp->lptr;
printf("Entry deleted
");
break;
}
}
temp=temp->rptr;

}
if(temp==NULL)
printf("Not Found
");
}
}
int isempty()
{
return l==NULL;
}

void makempty()
{
l=r=NULL;
printf("Address Book is Emptied
");
}





void display(char n[50])
{
int i,p=1;
if(isempty())
printf("Address Book is Empty
");
else
{
temp=l;
while(temp!=NULL)
{
i=stricmp(temp->name,n);
if(i==NULL)
{if(p==1)
printf("Entry is found in %dst position
",p);
else if(p==2)
printf("Entry is found in %dnd position
",p);
else if (p==3)
printf("Entry is found in %drd position
",p);
else
printf("Entry is found in %dth position
",p);
printf("Name :%s
Nick Name :%s
E-mail ID :%s
address
:%s
City
:%s
Contact.No:%s
Pin code
:%s
",temp->name,temp->nick,temp->email,temp->address,temp->city,temp->co
nt,temp->pin);
break;
}
temp=temp->rptr;
p++;
}
if(temp==NULL)
printf("Entry Not Found
");

}
}






void main()
{
int l=1,m;
int gd=DETECT,gm;
char n[50];
initgraph(&gd,&gm,"c:\tc\bgi");
while(l!=
{
clrscr();
textmode(C80);
textcolor(4);
cprintf("*****************************************************************
***************#------------------------MINI PROJECT-SIMPLE ADDRESS
BOOK----------------------#***********************************************
*********************************");
cprintf("Enter Your Choice");
printf("
");
cprintf("(1)-New Entry");
printf("
");
cprintf("(2)-Display an Entry");
printf("
");
cprintf("(3)-Delete an Entry");
printf("
");
cprintf("(4)-Display all Entries");
printf("
");
cprintf("(5)-Empty the book");
printf("
");
cprintf("(6)-Save Entry");
printf("
");
cprintf("(7)-Load Entries");
printf("
");
cprintf("(-Delete All Saved Files");
printf("
");
cprintf("(9)-End");
printf("
");
cprintf("*****************************************************************
***************");
printf("
");
scanf("%d",&l);
switch(l)
{
case 1:
textcolor(2);
newentry();
getch();
break;
case 2:
textcolor(2);
cprintf("Enter the Name of the Person to Display");
printf("
");
scanf("%s",&n);
display(n);
getch();
break;
case 3:
textcolor(2);
cprintf("Enter the Name of the Person to Delete");
printf("
");
scanf("%s",&n);
deletentry(n);
getch();
break;
case 4:
textcolor(2);
displayall();
getch();
break;
case 5:
textcolor(2);
makempty();
getch();
break;
case 6:
textcolor(2);
saventry();
getch();
break;
case 7:
textcolor(2);
loadentry();
getch();
break;
case 8:
textcolor(2);
deleteall();
getch();
break;
case 9:
textcolor(2);
printf("Program Ends Here.Thank You!!!");
printf("
");
getch();
break;
default:
textcolor(2);
printf("Enter a Valid Choice from 1-9 only");
printf("
");
getch();
break;
}
}
getch();
}
void saventry()
{
char n[50];
int c;
printf("Enter the Name of the Person
");
scanf("%s",n);
list t;
if(isempty())
printf("Address Book is Empty
");
else
{
FILE *f;
f=fopen("entry.c","a");
int i;t=l;
while(t!=NULL)
{
i=stricmp(t->name,n);
if(i==0)
{
fprintf(f,"
%s %s %s %s %s %s %s
",t->name,t->nick,t->email,t->address,t->city,t->cont,t->pin);
printf("Your Entry Saved
");
printf("Add Another Entry?
(1-yes/2-no)
");
scanf("%d",&c);
if(c==1)
saventry();
else if(c==2)
break;
}
t=t->rptr;

}
fclose(f);
if(t==NULL)
printf("Entry Not Found
");
}

}
void loadentry()
{
int i=1;
list t;
FILE *f;
f=fopen("entry.c","r");
if(f==NULL)
{
printf("Cannot Open
");
exit(1);
}
while(fscanf(f," %s %s %s %s %s %s %s
",t->name,t->nick,t->email,t->address,t->city,t->cont,t->pin)!=EOF)
{ printf("[%d] Name :%s
Nick Name :%s
E-mail ID
:%s
address :%s
City :%s
Contact.No:%s
Pin code
:%s
",i,t->name,t->nick,t->email,t->address,t->city,t->cont,t->pin);
i++;}
fclose(f);
}


void deleteall()
{
FILE *f;
f=fopen("entry.c","w");
fclose(f);
printf("all saved files were delete
");
}