c/tel.c

   1 /* mudruto1 DU4
   2  * sestaveni: gcc tel.c -o tel; nebo: make tel;
   3  * spusteni : ./tel
   4  */
   5
   6 #include <stdlib.h>
   7 #include <stdio.h>
   8
   9 //LinkedList + Funkce
  10 typedef struct {
  11   struct ll *next;
  12   void *data;
  13 } ll;
  14
  15 ll *ll_new() {
  16   ll *list = (ll*) malloc(sizeof(ll));
  17   if(!list) exit(1);
  18   list->next = 0;
  19   list->data = 0;
  20   return list;
  21 }
  22
  23 void ll_add(ll *list, void *ptr) {
  24   for(;list->next != 0;list = (ll *) list->next);
  25   list->next = (struct ll *) ll_new();
  26   list->data = (void *) ptr;
  27 }
  28
  29 void ll_rm(ll **llptr) {
  30   ll *freeptr = *llptr;
  31   *llptr = (ll *) (*llptr)->next;
  32   free(freeptr);
  33 }
  34
  35 void ll_walk(ll *list, void (*function)(ll *ptr)) {
  36   for(;list->next != 0;list = (ll *) list->next) function(list);
  37 }
  38
  39 void ll_walk_data(ll *list, void (*function)(void *ptr)) {
  40   for(;list->next != 0;list = (ll *) list->next) if(list->data != 0) function(list->data);
  41 }
  42
  43 //Kontakt + Funkce
  44 typedef struct {
  45   char name[16];
  46   char sname[16];
  47   char telno[16];
  48 } contact;
  49
  50 contact *contact_new() {
  51   contact *c = (contact*) malloc(sizeof(contact));
  52   if(!c) exit(1);
  53   scanf("%15s", c->name);
  54   if(c->name[0] == '.') return 0;
  55   scanf("%15s", c->sname);
  56   scanf("%15s", c->telno);
  57   return c;
  58 }
  59
  60 void contact_print(contact *c) {
  61   printf("%-15s %-15s %-15s\n", c->name, c->sname, c->telno);
  62 }
  63
  64 char contact_match(contact *c, char *str) { //vrati true, kdyz kontakt odpovida
  65   return !(strcmp(c->name, str) && strcmp(c->sname, str) && strcmp(c->telno, str));
  66 }
  67
  68 char contact_compare(contact *a, contact *b) { //vrati true, kdyz jsou kontakty stejne
  69   return !(strcmp(a->name, b->name) || strcmp(a->sname, b->sname) || strcmp(a->telno, b->telno));
  70 }
  71
  72
  73 char find_string[64] = "";
  74 void contact_find(ll *item) {
  75   if(contact_match(item->data, find_string)) {
  76     contact_print(item->data);
  77   }
  78 }
  79
  80 void contact_remove(ll **llptr) {
  81   //bohuzel nejde pouzit contact_find + ll_walk protoze je treba mit referenci na prvni polozku pro pripad potreby jejiho odstraneni
  82   while((*llptr)->next != 0) {
  83     if(contact_match((*llptr)->data, find_string)) {
  84       printf("DELETED: "); contact_print((*llptr)->data);
  85       ll_rm(llptr);
  86       return;
  87     }
  88     llptr = (ll **) &((*llptr)->next);
  89   }
  90 }
  91
  92
  93
  94 int main(void) {
  95
  96 /*
  97   //ukazka pouziti linked-listu
  98   ll *list = ll_new();
  99   ll_add(list, "foo");
 100   ll_add(list, "bar");
 101   ll_walk_data(list, puts);
 102   ll_rm(&list);
 103   puts("first item removed...");
 104   ll_walk_data(list, puts);
 105 */
 106
 107 /*
 108   //ukazka pouziti kontaktu
 109   contact *c = contact_new();
 110   if(!c) exit(2);
 111   contact_print(c);
 112 */
 113
 114   puts(
 115     "\n\tTelefonni seznam 0.1 (mudruto1)\n"
 116     "Zadavejte kontakty ve formatu 'jmeno prijmeni cislo' kazdy na novou radku.\n"
 117     "Po zadani posledniho kontaktu zadejte radku zacinajici teckou.\n"
 118     "priklad:\n"
 119     "tomas mudrunka 123456789\n"
 120     "daniel novak 987654321\n"
 121     "alice obrovska 456789123\n"
 122     ".\n"
 123   );
 124
 125   ll *seznam = (ll *) ll_new();
 126   contact *c;
 127   while(c = contact_new()) ll_add(seznam, c);
 128   puts(
 129     "------------------------------------------\n"
 130     "jmeno           prijmeni        cislo\n"
 131   );
 132   ll_walk_data(seznam, contact_print);
 133
 134   puts("\n\nCo hledat?");
 135   scanf("%15s", find_string);
 136   ll_walk(seznam, contact_find);
 137
 138   puts("\nCo smazat?");
 139   scanf("%15s", find_string);
 140   contact_remove(&seznam);
 141
 142   puts("\nTakto vypada seznam bez smazane polozky:\n");
 143   ll_walk_data(seznam, contact_print);
 144 }
 145