address.c

address.c

contents ::

  address.c
  atquick_sort.c
  bits.c
  countspace.c
  ctof.c
  hextoint.c
  hist.c
  indexof.c
  itob.c
  linkage.c
  lzw.c
  maxval.c
  merge.c
  merge_sort.c
  peof.c
  pointer.c
  quick2.c
  quick.c
  quick_sort.c
  reverse.c
  rftoc.c
  rmultiblank.c
  rtabs.c
  squeeze.c
  structoo.c
  syscall.c
  tempfunc.c
  tfc.c
  word.c

/* Address and Phone book program
   using an array of structures */

#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>

#define listings 20

struct add_ph {
  char first_name[10];
  char last_name[15];
  char phone[15];
  char address1[20];
  char address2[20];
  char city[15];
  char use_state[4];
  char zip[11];
} entry[listings];

void change(), newentry(), show();
void initialize(), enter(), input(int);
int menu();

int main(){
  char option;

  initialize();

  for(;;) {
    option = menu();
    switch(option) {
    case 'c': change();
      break;
    case 'n': newentry();
      break;
    case 's': show();
      break;
    case 'q': return 0;
    }
  }
}

// Subroutine to initialize the array
void initialize(){
  int j;

  for(j=0; j<listings; j++) *entry[j].last_name = '\0';
}

// Subroutine for menu selection
int menu(){
  char sel[10];
  char fed;
  printf("\n");
  do {
    //sel=0;
    printf("Choose from the following options:\n");
    printf("(N)ew entry\n");
    printf("(C)hange an existing entry\n");
    printf("(S)how all current entries\n");
    printf("(Q)uit\n\n");
    printf("Make your selection: ");
    scanf("%s", sel);
    //sel=tolower(getchar());
  } while (!strchr("ncsq", tolower(sel[0])));

  // will repeat until the user inputs any of the letters n, c, s, q

  return tolower(sel[0]);
}

// Inputs information for new entries or updating entries
void input(int j){
  // char str[90];

  printf("First name: ");
  scanf("%s", entry[j].first_name);

  printf("Last name: ");
  scanf("%s", entry[j].last_name);

  printf("Phone number: ");
  scanf("%s", entry[j].phone);

  printf("Address line 1: ");
  scanf("%s", entry[j].address1);

  printf("Address line 2: ");
  scanf("%s", entry[j].address2);

  printf("City: ");
  scanf("%s", entry[j].city);

  printf("2-letter state abbreviation: ");
  scanf("%s", entry[j].use_state);

  printf("Zip code: ");
  scanf("%s", entry[j].zip);
}

// Subroutine to make new entry
void newentry(){
  int j;

  for(j=0; j<listings; j++)
    if (!*entry[j].last_name) break; // finds first empty listing

  if (j==listings) {
    printf("I'm sorry, the phone book is full.\n");
    return;
  }

  input(j);
}

// Subroutine to change an existing entry
void change(){
  int j;
  char LN[50];

  printf("Enter the person's last name: ");
  scanf("%s",LN);

  for(j=0; j<listings; j++)
    if(!strcmp(LN, entry[j].last_name)) break;

  if(j==listings) {
    printf("No listing found.\n");
    return;
  }

  printf("Enter new information.\n");
  input(j);
}

// Subroutine to show the listings
void show(){
  int j;

  for(j=0; j<listings; j++) {
    if (*entry[j].last_name) {
      printf("Name:    %s ",entry[j].first_name);
      printf("%s\n",entry[j].last_name);
      printf("Phone:   %s\n",entry[j].phone);
      printf("Address: %s st.\n",entry[j].address1);
      printf("Address: %s\n",entry[j].address2);
      printf("City:    %s, ",entry[j].city);
      printf("%s ",entry[j].use_state);
      printf("%s\n\n",entry[j].zip);
    }
  }
}

James Little