Add to Favorites    Make Home Page 30232 Online  
 Language Categories  
 Our Services  

Home » C Home » File Operations Home » To read a phone record Database from File(*.txt)


Search Projects & Source Codes:

Title To read a phone record Database from File(*.txt)
Author Jatin Rajpal
Author Email jatin911 [at]
Description The program mainly reads (phone no., person name) from a txt file (u can add your own elements to make it comprehensive) and loads it into a LINKED LIST and all file manipulations are carried over the linked list. Later on, when the program exits, The changes are reflected back to
the file.

Category C » File Operations
Hits 20869
Code Select and Copy the Code
Code : /* PROGRAM TO IMPLEMENT A PHONE RECORD DATABASE USING LINKED LIST AND FILE HANDLING USING FORMATTED I/O FUNCTIONS fscanf() and fprintf() AUTHOR: JATIN RAJPAL */ # include <conio.h> # include <stdio.h> # include <alloc.h> # include <string.h> struct node { int num; char name[15]; struct node *next; }; struct node *list; //global start pointer FILE *fp; // Global file pointer struct node *getrecord() { struct node *temp,e; temp=(struct node*)malloc(sizeof(struct node)); printf(" Reached till here..."); getch(); fflush(stdin); // fscanf(fp,"%d %s ",&temp->num,temp->name); fread(&temp,sizeof(temp),1,fp); printf("%d %s",temp->num,temp->name); // temp->num=e.num; // strcpy(temp->name,; getch(); temp->next = NULL; return temp; } struct node *getnode() { struct node *temp; temp = (struct node*)malloc(sizeof(struct node)); printf(" Enter the person's phone number--->"); scanf("%d",&temp->num); printf(" Enter the person's Name--->"); scanf("%s",&temp->name); temp->next = NULL; return temp; } struct node *search(int id,int *flag) { struct node *cur,*prev; *flag=0; if (list==NULL) return NULL; for(prev=NULL,cur=list; (cur); prev=cur,cur=cur->next) if(cur->num == id) { *flag = 1; break; } return prev; } int insert(struct node *new1) { struct node *prev; int flag; prev = search(new1->num,&flag); if(list==NULL) { list = new1; //first node in list return; } if(flag==1) return -1; else { new1->next = prev->next; prev->next = new1; // insert in the middle or end } return 0; } void display() { struct node *cur; auto int n=0; if(list==NULL) { printf(" List empty !"); return; } printf(" The phone records are---> "); cur=list; for(cur=list;(cur);cur=cur->next) { printf(" Record no. %d---> ",n+1); printf(" Record phone no.:%d",cur->num); printf(" person Name:%s ",cur->name); n++; } } int delnode(int id) { struct node *prev,*temp; int flag=0; if(list==NULL) return -1; prev=search(id,&flag); if(flag==0) return -1; if(prev==NULL) { temp=list; list=list->next; free(temp); } else { temp=prev->next; prev->next=temp->next; free(temp); } return 0; } struct node *query(int id,char *flag,int toggle) { struct node *cur,*prev; int x=0; if(list==NULL) return NULL; if(toggle) { for(prev=NULL,cur=list; (cur); prev=cur,cur=cur->next) if(cur->num == id) { x=1; break; } } else { for(prev=NULL,cur=list; (cur); prev=cur,cur=cur->next) if(!strcmp(cur->name,flag)) { x=1; break; } } if(x==0) { printf(" The number doesnt exist !"); return NULL; } return cur; } void CopyToFile() { FILE *fp; struct node *cur; fp=fopen("phone.txt","w"); cur=list; if(cur==NULL) { printf(" The list is empty, nothing to write back..."); return; } for(cur=list;(cur);cur=cur->next) fprintf(fp,"%d %s ",cur->num,cur->name); //writing back to file fclose(fp); } void main() { int ch=0,ans=0; int val=0; char str[15]; struct node *new1,*new2; clrscr(); /* initialization of list with the existing records */ fp=fopen("phone.txt","r"); if(fp==NULL) { printf(" File cant be opened !"); getch(); exit(1); } while(!feof(fp)) { new1=getrecord(); if(insert(new1)==-1) printf(" Cant insert record ! Error..."); else printf(" Record entered..."); } getch(); fclose(fp); do { clrscr(); printf(" Menu"); printf(" 1. Add a New phone record."); printf(" 2. Delete an existing Record."); printf(" 3. show all Records."); printf(" 4. Modify a particular Record."); printf(" 5. Exit."); printf(" Enter your choice--->"); scanf("%d",&ch); switch(ch) { case 1: new1 = getnode(); val = insert(new1); if(val==-1) printf(" Employee id already exists ! try again..."); else printf(" Employee details successfully stored"); break; case 2: printf(" Enter the phone wish to delete--->"); scanf("%d",&val); ans=delnode(val); if(ans==-1) printf(" Record doesnt exist ! Try again..."); if(ans==0) printf(" Record deleted !"); break; case 3: display(); break; case 4: printf(" Search by phone no. or Name ? (1/2)--->"); scanf("%d",&ch); if(ch==1) { printf(" Enter the phone no. you wish to search for--->"); scanf("%d",&val); new2=query(val,&str,1); } else { printf(" Enter the name of the person you wish to search for--->"); scanf("%s",&str); new2=query(val,&str,0); } if(new2) { printf(" Enter the New name of the person--->"); scanf("%s",&new2->name); printf(" Enter new phone no. of the person--->"); scanf("%d",&new2->num); printf(" Record modified successfully !"); } break; case 5: printf(" Leaving Database,writing back to file..."); CopyToFile(); getch(); free(list); exit(1); break; } getch(); }while(1); }

Related Source Codes

Script Name Author
The Game Opposite as seen on Nokia 2300 Mobile Manikanta
Radix Sort ashish
Change your mouse pointer Ashim
The blinking star Shashank
Data Validation Crylittlebaby
To search a file by giving file type like mp3 or mpeg or doc Prashanth SR
Menus Demonstration B.Chidhambaram
Employee Database Project Using C. Reenku Raman Nayak
Creating a Lexical Analyzer in c fahad bader al-buhairi դ ? ??
Calendar Program Omkar & Devendra
Stop double Process for start in C Cedrik Jurak
Stop double Process for start in C Cedrik Jurak
Time Scheduler Atiq Anwar
A timepass game between atmost two players Rahul Roy


Google Groups Subscribe to SourceCodesWorld - Techies Talk

Free eBook - Interview Questions: Get over 1,000 Interview Questions in an eBook for free when you join JobsAssist. Just click on the button below to join JobsAssist and you will immediately receive the Free eBook with thousands of Interview Questions in an ebook when you join.

New! Click here to Add your Code!

ASP Home | C Home | C++ Home | COBOL Home | Java Home | Pascal Home
Source Codes Home Page


Google Search


Source Codes is a part of Vyom Network.

Vyom Network : Web Hosting | Dedicated Server | Free SMS, GRE, GMAT, MBA | Online Exams | Freshers Jobs | Software Downloads | Interview Questions | Jobs, Discussions | Placement Papers | Free eBooks | Free eBooks | Free Business Info | Interview Questions | Free Tutorials | Arabic, French, German | IAS Preparation | Jokes, Songs, Fun | Free Classifieds | Free Recipes | Free Downloads | Bangalore Info | Tech Solutions | Project Outsourcing, Web Hosting | GATE Preparation | MBA Preparation | SAP Info | Software Testing | Google Logo Maker | Freshers Jobs

Sitemap | Privacy Policy | Terms and Conditions
Copyright ©2003-2017, All Rights Reserved.
Page URL:

Download Yahoo Messenger | Placement Papers | Free SMS | C Interview Questions | C++ Interview Questions | Quick2Host Review