Thread: tell me the errors of this simple phone book ?

this simple phonebook programme has some errors.its not compile.can someone correct the code?

Code:

/*
Description:
A program utilizing data structures to create, delete, and display phone book entries.
User can add, delete, and print the phone book entries.
*/

#include <stdio.h>     // Standard C input & output library
#include <stdlib.h>    // mallac, callac, and free functions
#include <string.h>		// String functions (string copy, string compare)


typedef struct PhoneBookEntry         // Declaration of phone book structure
{
     char FirstName[21];
     char LastName[21];
     int PhoneNum;
} person; 

// FUNCTION PROTOTYPES:
void Add (int*, int, person*);	// Function to add an entry
void Del (int*, int, person*);	// Function to delete an entry
void Print (int*, int, person*);	// Function to print the phone book


int main() {             // Main driving function

    int select=0; // Integer variable for user input of phone book operation
    int contact_ctr=0; // Counter to track number of contacts
    int i=0; // Index for printing "for" loop
	
    
    person contacts[50];   // Declare an array of phone book entries
    person* pcontacts;  // Declare a pointer for array Entries
    pcontacts = (person*) calloc(0, sizeof(person));    // Set pointer to allocated/initialized block of memory, size of person struct
    if (pcontacts == NULL)
       {printf("Out of memory!  Aborting...");
       return 1;}
    else  {}    // Do nothing!

    
    do {  // Print menu to screen, ask user for selection...
        printf("\n\nPhone Book Application:\n\n");
        printf("1) Add friend\n");
        printf("2) Delete friend\n");
        printf("3) Show phone book\n");
        printf("4) Exit\n");
        printf("What do you want to do? ");
        scanf("%d", &select);    // Store user input in variable "select"
        getchar();               // Clear the input buffer
   
        switch (select)
        {
               case 1:     // User wants to add an entry
				    pcontacts = realloc(pcontacts, contact_ctr * sizeof(person));     // Reallocate memory for additional contact
					Add (&contact_ctr, i, contacts);
                    break;
               case 2:    // User wants to delete an entry
					Del (&contact_ctr, i, contacts);
                    break;
               case 3:    // User wants to print the phone book
					Print (&contact_ctr, i, contacts);
					break;
               case 4:    // User wants to quit, break the switch and exit to loop
                    break;
               default:   // User entered a value other than 1,2,3, or 4.
                    printf("You entered an invalid selection.  Try again.\n\n\n"); 
                    break;
        }  // End switch statement
        }  // End do loop
        
   while (select!=4);
   
   printf("\nThis phone book will now close.  Goodbye!\n");
   // Pause program until user inputs any character
   getchar();
   // Return statement
   return 0;
}      // End main


void Add (int *contact_ctr, int i, person *contacts)
{
	(*contact_ctr)++;
	// Need to add realloc failsafe, if NULL
    printf("\nFirst name: ");
    scanf("%s", &contacts[*contact_ctr-1].FirstName);
    printf("Last name: ");
    scanf("%s",  &contacts[*contact_ctr-1].LastName);
    printf("Phone number (7-digit, no dash): ");
    scanf("%d",  &contacts[*contact_ctr-1].PhoneNum);
    printf("Record added to the phone book\n\n");
}	// End function Add

void Del (int *contact_ctr, int i, person *contacts)
{
	char delTempf[21];	// Temporary string for deletion of an entry - first name
	char delTempl[21];	// Temporary string for deletion of any array - last name
	char nullStr[21] = {"\0"};	// Null string for use in deleting entries

	printf("\nFirst name: ");
	scanf("%s", &delTempf);
    printf("Last name: ");
	scanf("%s", &delTempl);
	// compare strings, find entry or return entry not found
	for (i=0; i<*contact_ctr; i++)
	{
		if (strcmp(delTempf, contacts[i].FirstName) == 0)
		{
			strcpy(contacts[i].FirstName, nullStr);
			strcpy(contacts[i].LastName, nullStr);
			strcpy(contacts[i].PhoneNum, nullStr);
			free(&contacts[i]);
			(*contact_ctr)--;	// Contact deleted, update the contact total counter
			break;
		}
		else
		{
			printf("\nEntry not found.\n\n");				
		}
	}	// End for loop

    printf("Record deleted from the phone book\n\n");
}	// End function Del

void Print (int *contact_ctr, int i, person *contacts)
{
	char nullStr[21] = {"\0"};	// Null string
	if (*contact_ctr > 0)	// If there are entries, print them
	{
		printf("\n\nPhone Book Entries:\n\n");
		for(i=0; i<*contact_ctr; i++)
		{
			if (strcmp(nullStr, contacts[i].FirstName) != 0)	// If this index is NOT null, print it
			{
				printf("%s %s %d\n", contacts[i].FirstName, contacts[i].LastName, contacts[i].PhoneNum);
			}
			else {}	// Do nothing (skip this index because no entry exists)
		} // end for loop
	}
	else	// Else the book is empty, tell the user
	{
		printf("\n\nThe phone book is currently empty.\n\n");
	}
}	// End function Print

You need to get more engaged in your program, Blogchama. You must have tried to compile your program, so you tell us, exactly what ARE the errors?

What did you do to try to fix them?

Sounds like a homework "dump" onto a forum, to me.

Originally Posted by Adak

You need to get more engaged in your program, Blogchama. You must have tried to compile your program, so you tell us, exactly what ARE the errors?

What did you do to try to fix them?

Sounds like a homework "dump" onto a forum, to me.

i try to fix them,but have't a clear idea about the erorors,thats why asked for a help.