Using structure representing a person's name from given array.

#include 

#include 

#include 

#include 



#define FIRST_NAME_LEN  31

#define SECOND_NAME_LEN 51

#define NUMBER_LEN      16

#define MAX_NUMBERS     50





/* Structure defining a name */

struct Name

{

  char firstname[FIRST_NAME_LEN];

  char secondname[SECOND_NAME_LEN];

};



/* Structure defining a phone record */

struct PhoneRecord

{

  struct Name name;

  char number[NUMBER_LEN];

};



/* Function prototypes */

void show(struct PhoneRecord record);                       /* Output a phone record         */

bool has_name(struct PhoneRecord record, struct Name name); /* Test for a name               */

struct Name read_name();                                    /* Read a name from the keyboard */



int main(void)

{

  char answer = 'n';

  struct PhoneRecord records[MAX_NUMBERS];                  /* Array of phone records        */

  struct Name aName;                                        /* Stores a name                 */

  int count = 0;                                            /* Number of phone records       */

  bool found = false;                                       /* Records when a name has been found */



  /* Read an arbitrary number of phone records from the keyboard */

  do

  {

    records[count].name = read_name();                 /* Read the name */

    printf("Enter the number for this name: ");

    scanf(" %[ 0123456789]",records[count++].number);  /* Read the number - including spaces */



    printf("Do you want to enter another(y or n)?: ");

    scanf(" %c", &answer);

  }while(count<=MAX_NUMBERS && tolower(answer) == 'y');



  /* Search the array of phone records for a number */

  do

  {

    printf("Enter a name for which you want the number.");

    aName = read_name();

    for(int i = 0 ; i    {

      if(has_name(records[i], aName))                 /* Test for the name */

      {

        if(!found)                                    /* If this is the first time */

        {

          found = true;                               /* Reset found flag       */

          printf("The numbers for this name are:\n"); /* and output the heading */

        }

        printf("%s\n", records[i].number);            /* Output the number for the name */

      }

    }

    if(found)                                         /* If the name was found */

      found = false;                                  /* Reset the found flag  */

    else                                              /* Otherwise output message */

      printf("No numbers found for this name.\n");

    printf("Do you want to search for another (y or n)? ");

    scanf(" %c" , &answer);

  }while(tolower(answer) == 'y');



  for(int i = 0 ; i    show(records[i]);

  printf("\n");

  return 0;

}



/* Function to output a record */

void show(struct PhoneRecord record)

{

  printf("\n%s %s   %s", record.name.firstname,record.name.secondname, record.number);

}



/* Function to test whether the name is the same as in a record */

bool has_name(struct PhoneRecord record, struct Name name)

{

  return (strcmp(name.firstname, record.name.firstname)==0 && strcmp(name.secondname, record.name.secondname) == 0);

}



/* Function to read a name and store it in a Name structure */

struct Name read_name()

{

    struct Name name;

    printf("Enter a first name: ");

    scanf(" %s", &name.firstname);

    printf("Enter a second name: ");

    scanf(" %s", &name.secondname);

  return name;

}

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