so far the address book is compiling and takes in entries and runs all the other functions but the search and delete methods don't work even though I have the entry entered in a file and the code should use that very same file to display the names etc if anyone could help I wanna know why the program will not search/display or delete any entries.

#include<stdio.h>
#include<ctype.h>
#include<string.h>
#include<stdlib.h>
#define NAME 50
#define ADDRESS 50
#define PHONE 20
#define EMAIL 20
#define SIZE 500
void Insert();
void Deleteinfo();
void Display();
void Search();
void Exit();
char info[SIZE];
struct addressbook
{
  char name [NAME];
  char address [ADDRESS];
  char phone [PHONE];
  char email [EMAIL];
  char Target[NAME];
} myaddressbook;

FILE *AddressBook;
FILE *rectemp;
int main()
{  
  int choice=0;
  printf("Welcome \n");
    printf("\n 1> Insert new Entry\n");
    printf("\n 2> Delete Entry\n");
    printf("\n 3> Display all Entry\n");
    printf("\n 4> Search Entry\n");
    printf("\n 5> Exit the program\n");
    printf("\n Enter your choice <1-5>: ");
    scanf("%i",&choice);
    if(choice == 1){
    Insert();
    return main();
    }
    else if(choice ==2){
    Deleteinfo();
    return main();
    }
    else if(choice ==3){
    Display();
    return main();
    }
    else if(choice ==4){
    Search();
    return main();
 }
    else if(choice ==5){
    printf("Exit program \n");
 Exit();
    }
    }
void Insert()
{
  char choice1;
  do
  {  //opening the AddressBook file
    AddressBook = fopen("AddressBook.txt","a+");
    printf("Enter Person's Name\n");
    scanf("%s",myaddressbook.name);
    printf("Enter Person's Address\n");
    scanf("%s",myaddressbook.address);
    printf("Enter Person's Phone no.\n");
    scanf("%s",myaddressbook.phone);
    printf("Enter Person's E-mail\n");
    scanf("%s",myaddressbook.email);
    fprintf(AddressBook,"%s %s %s %s  \n",myaddressbook.name,myaddressbook.address,myaddressbook.phone,myaddressbook.email);
    fclose(AddressBook);
    printf("Press y/Y to Execute the Program Again \n");
    scanf("%c",&choice1);
  }
  while(choice1=='y'||choice1=='Y');
  main();
}
void Deleteinfo()
{
  char choice2;
  char Target[SIZE];
  int Found=0;
  rectemp=fopen("rectemp.txt","w");
  if((AddressBook=fopen("AddressBook.txt","r"))==NULL)
    printf("**The File is Empty**\n\n");
  else{
    printf("\tEnter Person's Name : ");
    while(!(AddressBook))
    {
      fscanf(AddressBook,"%s %s %s %s",myaddressbook.name,myaddressbook.address,myaddressbook.phone,myaddressbook.email);
      if(feof(AddressBook))
        break;
      if(strcmp(Target,myaddressbook.name)!=0)
        fprintf(rectemp,"%s %s %s %s \n",myaddressbook.name,myaddressbook.address,myaddressbook.phone,myaddressbook.email);
      else {
        Found=1;
      }
      if (!Found)
      {
        printf("\t**There is no such Entry\n");
      }
      printf("\t**Item is Deleted**\n");
      fclose(AddressBook);
      fclose(rectemp);
      remove("Addressbook.txt");
      rename("rectemp.txt","AddressBook.txt");
      do{
        printf("Press y/Y to Execute the Program Again \n");
        scanf("%c",&choice2);   
      }
      while(choice2=='y'||choice2=='Y');
   main();
    }
  }
}
void Display()
{
  char choice3;
  AddressBook = fopen("AddressBook.txt","a+");
  do
  {
    fgets(info,SIZE,AddressBook);
    printf("%s\n",info);
  }while(!(AddressBook));
  fclose(AddressBook);
  do{
    printf("Press y/Y to Execute the Program Again \n");
    scanf("%c",&choice3);

  }while(choice3=='y'||choice3=='Y');
  main();
}
void Search()
{
  char choice4; 
  char Target[SIZE];
  int Found=0;
  if((AddressBook=fopen("AddressBook.txt","r"))==NULL)
    printf("**The file is empty** !!\n\n");
  else
  {
    printf("\tEnter The Name:");
    scanf("%s",Target);
    while(!(AddressBook)&& Found==0)
    {
      fscanf(AddressBook,"%s %s %s %s ",myaddressbook.name,myaddressbook.address,myaddressbook.phone,myaddressbook.email);
      if(strcmp(Target,myaddressbook.name)==0)
        Found=1;
    }
    if(Found)
    {
      printf("The Name is:               %s\n",myaddressbook.name);
      printf("The Address is:            %s\n",myaddressbook.address);
      printf("The phone number is:       %s\n",myaddressbook.phone);
      printf("The e-mail is:             %s\n",myaddressbook.email);
    }
    else if(!Found)
      printf("**There is no such Entry**\n");
    fclose(AddressBook);
  }
  do{
    printf("Press y/Y to Execute the Program Again \n");
    scanf("%c",&choice4);
  }
  while(choice4=='y'||choice4=='Y');
  main();
}

void Exit()
{
  exit(0);
}

I've never seen anybody do something like "return main()" before. Use a while loop instead if you are trying to get the effect of looping.

I've tried that but what happens is the program quits after I run the choosen option, everything works perfectly its just I don't see why it won't search and display...

so far the address book is compiling and takes in entries and runs all the other functions but the search and delete methods don't work even though I have the entry entered in a file and the code should use that very same file to display the names etc if anyone could help I wanna know why the program will not search/display or delete any entries.

#include<stdio.h>
#include<ctype.h>
#include<string.h>
#include<stdlib.h>
#define NAME 50
#define ADDRESS 50
#define PHONE 20
#define EMAIL 20
#define SIZE 500
void Insert();
void Deleteinfo();
void Display();
void Search();
void Exit();
char info[SIZE];
struct addressbook
{
  char name [NAME];
  char address [ADDRESS];
  char phone [PHONE];
  char email [EMAIL];
  char Target[NAME];
} myaddressbook;

FILE *AddressBook;
FILE *rectemp;
int main()
{  
  int choice=0;
  printf("Welcome \n");
    printf("\n 1> Insert new Entry\n");
    printf("\n 2> Delete Entry\n");
    printf("\n 3> Display all Entry\n");
    printf("\n 4> Search Entry\n");
    printf("\n 5> Exit the program\n");
    printf("\n Enter your choice <1-5>: ");
    scanf("%i",&choice);
    if(choice == 1){
    Insert();
    return main();
    }
    else if(choice ==2){
    Deleteinfo();
    return main();
    }
    else if(choice ==3){
    Display();
    return main();
    }
    else if(choice ==4){
    Search();
    return main();
 }
    else if(choice ==5){
    printf("Exit program \n");
 Exit();
    }
    }
void Insert()
{
  char choice1;
  do
  {  //opening the AddressBook file
    AddressBook = fopen("AddressBook.txt","a+");
    printf("Enter Person's Name\n");
    scanf("%s",myaddressbook.name);
    printf("Enter Person's Address\n");
    scanf("%s",myaddressbook.address);
    printf("Enter Person's Phone no.\n");
    scanf("%s",myaddressbook.phone);
    printf("Enter Person's E-mail\n");
    scanf("%s",myaddressbook.email);
    fprintf(AddressBook,"%s %s %s %s  \n",myaddressbook.name,myaddressbook.address,myaddressbook.phone,myaddressbook.email);
    fclose(AddressBook);
    printf("Press y/Y to Execute the Program Again \n");
    scanf("%c",&choice1);
  }
  while(choice1=='y'||choice1=='Y');
  main();
}
void Deleteinfo()
{
  char choice2;
  char Target[SIZE];
  int Found=0;
  rectemp=fopen("rectemp.txt","w");
  if((AddressBook=fopen("AddressBook.txt","r"))==NULL)
    printf("**The File is Empty**\n\n");
  else{
    printf("\tEnter Person's Name : ");
    while(!(AddressBook))
    {
      fscanf(AddressBook,"%s %s %s %s",myaddressbook.name,myaddressbook.address,myaddressbook.phone,myaddressbook.email);
      if(feof(AddressBook))
        break;
      if(strcmp(Target,myaddressbook.name)!=0)
        fprintf(rectemp,"%s %s %s %s \n",myaddressbook.name,myaddressbook.address,myaddressbook.phone,myaddressbook.email);
      else {
        Found=1;
      }
      if (!Found)
      {
        printf("\t**There is no such Entry\n");
      }
      printf("\t**Item is Deleted**\n");
      fclose(AddressBook);
      fclose(rectemp);
      remove("Addressbook.txt");
      rename("rectemp.txt","AddressBook.txt");
      do{
        printf("Press y/Y to Execute the Program Again \n");
        scanf("%c",&choice2);   
      }
      while(choice2=='y'||choice2=='Y');
   main();
    }
  }
}
void Display()
{
  char choice3;
  AddressBook = fopen("AddressBook.txt","a+");
  do
  {
    fgets(info,SIZE,AddressBook);
    printf("%s\n",info);
  }while(!(AddressBook));
  fclose(AddressBook);
  do{
    printf("Press y/Y to Execute the Program Again \n");
    scanf("%c",&choice3);

  }while(choice3=='y'||choice3=='Y');
  main();
}
void Search()
{
  char choice4; 
  char Target[SIZE];
  int Found=0;
  if((AddressBook=fopen("AddressBook.txt","r"))==NULL)
    printf("**The file is empty** !!\n\n");
  else
  {
    printf("\tEnter The Name:");
    scanf("%s",Target);
    while(!(AddressBook)&& Found==0)
    {
      fscanf(AddressBook,"%s %s %s %s ",myaddressbook.name,myaddressbook.address,myaddressbook.phone,myaddressbook.email);
      if(strcmp(Target,myaddressbook.name)==0)
        Found=1;
    }
    if(Found)
    {
      printf("The Name is:               %s\n",myaddressbook.name);
      printf("The Address is:            %s\n",myaddressbook.address);
      printf("The phone number is:       %s\n",myaddressbook.phone);
      printf("The e-mail is:             %s\n",myaddressbook.email);
    }
    else if(!Found)
      printf("**There is no such Entry**\n");
    fclose(AddressBook);
  }
  do{
    printf("Press y/Y to Execute the Program Again \n");
    scanf("%c",&choice4);
  }
  while(choice4=='y'||choice4=='Y');
  main();
}

void Exit()
{
  exit(0);
}

You could change the format of the while loop to

while (fgets(info,SIZE,AddressBook)!=NULL);
    {printf("%s\n",info);}

is that change just for the display method or do I have to change the while loops for delete,search and display...technically the search and display are the same if one method just finds what I'm looking for then gr8 so should I focus more on display or the search methods?

is that change just for the display method or do I have to change the while loops for delete,search and display...technically the search and display are the same if one method just finds what I'm looking for then gr8 so should I focus more on display or the search methods?

You could apply them to all if you like

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