Code:
#include "ok.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
ADDRESS *hol= NULL; /* Head of our linked list of addresses -
global variable*/
int main()
{
char input[MAXLEN]; /* Input from the user */
/* while (hol != NULL){*/
FILE *in_file;
in_file = fopen("address.txt", "w" );
;
/* }*/
while (1){
printf ("Add\n Edit\n Delete\n Delete all(Q)\n/ (P)Search for a contact\n/(L)ist\n/(O)Print TABLE\n");
fgets (input, MAXLEN,stdin);
switch (input[0]) {
case ('a'):
case ('A'):
add_to_list();
break;
case ('d'):
case ('D'):
delete_from_list();
break;
case ('e'):
case ('E'):
modifica();
break;
case ('o'):
case ('O'):
table_names();
break;
case ('p'):
case ('P'):
print_name();
break;
case ('l'):
case ('L'):
list_names();
break;
case ('x'):
case ('X'):
break;
case ('q'):
case ('Q'):
free_list();
return (0);
default:
printf ("Unknown command\n");
}
}
return 0;
}
void add_to_list (void)
/* Add a new name to our address book */
{
ADDRESS *new_name;
FILE *outfile;
new_name= (ADDRESS *)malloc (sizeof (ADDRESS));
if (new_name == NULL) {
printf ("Out of memory!\n");
exit (-1);
}
outfile = fopen ("contactlist.dat", "w");
/* Get input for the new item */
printf ("Enter the position of the contact [numerically/alphabetically]: ");
fgets (new_name->pos, MAXLEN, stdin);
printf ("Enter the First Name: ");
fgets (new_name->name, MAXLEN, stdin);
printf ("Enter the Last Name: ");
fgets (new_name->lname, MAXLEN, stdin);
/* printf ("Enter the Address: ");
fgets (new_name->address, MAXLEN, stdin);
printf ("Enter the Telephone number [can contain letters]: ");
fgets (new_name->phone, MAXLEN, stdin);
printf ("Enter the Mobile number [can contain letters]: ");
fgets (new_name->mobile, MAXLEN, stdin);*/
/* Chain the new item into the list */
new_name->next= hol;
hol= new_name;
}
void delete_from_list (void)
/* Remove a name from the address book */
{
ADDRESS *del_ptr; /* Pointer to find name to delete */
ADDRESS *prev_ptr; /* Pointer to name BEFORE this name */
char del_name[MAXLEN]; /* Name to delete */
printf ("Name> ");
fgets (del_name, MAXLEN, stdin);
/* The first item in the list being deleted is a special case */
if (hol == NULL) {
printf ("No list to delete from\n");
return;
}
/* If the first name is the correct one then move the head of list on to the next head of list */
if (strcmp(hol->name, del_name) == 0) {
del_ptr= hol;
hol= hol->next;
free(del_ptr);
return;
}
/* Otherwise loop round the list looking for the name */
prev_ptr= hol;
while (prev_ptr->next != NULL) {
/* We've found the name so delete it */
if (strcmp(prev_ptr->next->name,del_name) == 0) {
del_ptr= prev_ptr->next;
prev_ptr->next= del_ptr->next;
free(del_ptr);
return;
}
prev_ptr= prev_ptr->next;
}
printf ("Name not found!\n");
}
void print_name (void)
/* Print a name from the list */
{
char name[MAXLEN]; /* Name to look for */
ADDRESS *search_ptr; /* Pointer to search list for name */
printf ("Name> ");
fgets (name, MAXLEN, stdin);
search_ptr= hol;
while (search_ptr != NULL) {
if (strcmp (search_ptr->name, name) == 0) {
printf ("Position in the Phone Book: %s", search_ptr->pos);
printf ("Last Name: %s", search_ptr->lname);
printf ("Address: %s", search_ptr->address);
printf ("Telephone : %s", search_ptr->phone);
printf ("Mobile : %s", search_ptr->mobile);
return;
}
search_ptr= search_ptr->next; /* Move to next item */
}
printf ("No such name\n");
}
void list_names (void)
/* List all names in the book */
{
ADDRESS *tmp_ptr; /* Traverses list */
printf ("All names in address book:\n");
tmp_ptr= hol;
while (tmp_ptr != NULL) {
printf ("%s %s",tmp_ptr->name,tmp_ptr->lname);
tmp_ptr= tmp_ptr->next;
}
}
void free_list (void)
/* Free memory for list */
{
ADDRESS *del_ptr; /* Pointer to part to delete */
while (hol != NULL) {
del_ptr= hol; /* Store the head of list */
hol= hol->next; /* Move on to the next bit */
free(del_ptr); /* Free the memory for the bit we just left */
}
}
void table_names (void)
{
ADDRESS *tmp_ptr;
printf ("All names in address book:\n");
tmp_ptr= hol;
printf(" ______________________________\n");
printf("| FIRST NAMES | LAST NAMES |\n");
printf("|________________|_____________|\n");
while(tmp_ptr!=NULL)
{
printf ("%s%s",tmp_ptr->name,tmp_ptr->lname);
tmp_ptr= tmp_ptr->next;
}
}
void modifica(void)
{
char scegli;
ADDRESS*ptr;
char str1[MAXLEN];
ptr=hol;
if(!ptr)
printf("\nPhonebook empty!!");
else
{
printf("\nInsert last name: ");
scanf("%s", str1);
if(strcmp(str1, ptr->lname)!=0)
{
/* ptr=ptr->link_dx;
if(ptr==NULL)*/
printf("\nContat nonexistent!");}
else{
printf("\nContact: %s %s\n", ptr->lname, ptr->name);
printf("\nChange the last name too? (y/n) ");
scanf("%1s", &scegli);
}
if(scegli=='y')
{
printf("\nInsert new last name: ");
scanf("%s", str1);
strcpy(ptr->lname, str1);
}
printf("\nChange the name??(y/n) ");
scanf("%1s", &scegli);
if(scegli=='y')
{
printf("\nInsert new name: ");
scanf("%s", str1);
strcpy(ptr->name, str1);
}
/* printf("\nModify the number?(y/n) ");
scanf("%1s", &scegli);
if(scegli!='n')
{
printf("\nInsert new number: ");
scanf("%s", str1);
strcpy(ptr->numero, str1);
}*/
}
printf("DONE!");
}
Problem with function table_names.
Originally Posted by Nephilim
