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Author Email prabhakaran_tiger [at]
Description This program is designed using doubly linked list and file
operations.It's code is to understand and use it.

Category C++ » Data Structures
Hits 418236
Code Select and Copy the Code
#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!=8) { 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("(8)-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 "); }

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