Процесс завершен с возвращаемым значением 3221225477
Первое, что нужно сделать при компиляции, это запросить максимальный уровень предупреждения, если я введу gcc -pedantic -Wextra в вашем коде, компилятор выдаст этистроки:
char DelF = 0;
char DelL = 0;
int DelNum = 0;
strcpy(con[a].FirstName, DelF);
strcpy(con[a].LastName, DelL);
strcpy(con[a].PhoneNum, DelNum);
strcpy неверны, поскольку вторым параметром является char / int , а char * (с нулевым символом окончания) ожидается, поведение не определено, в вашем случае сбой.Обратите внимание, что PhoneNum является int , а не массивом char, поэтому для него будет хуже, если я могу сказать.
Если цель состоит в том, чтобы очистить 2 строкии сбросьте номер телефона, просто сделайте:
con[a].FirstName[0] = 0;
con[a].LastName[0] = 0;
con[a].PhoneNum = 0;
После этих исправлений выполняется:
Phone Book
[1] Add a contact
[2] Delete a contact
[3] Show contacts
[4] Exit program
What function would you like to use?
1
You chose to add a contact.
First name: test
Last name: 1
Phone number (Numbers only): 1234567
Record added to the phone book
New contact:
First name: test
Last name: 1
Phone number: 1234567
Contact number is 0
Phone Book
[1] Add a contact
[2] Delete a contact
[3] Show contacts
[4] Exit program
What function would you like to use?
1
You chose to add a contact.
First name: Test
Last name: 2
Phone number (Numbers only): 8901234
Record added to the phone book
New contact:
First name: Test
Last name: 2
Phone number: 8901234
Contact number is 1
Phone Book
[1] Add a contact
[2] Delete a contact
[3] Show contacts
[4] Exit program
What function would you like to use?
3
You chose to show the contacts.
Contact #0
First name: test
Last name: 1
Phone number: 1234567
Contact #1
First name: Test
Last name: 2
Phone number: 8901234
Phone Book
[1] Add a contact
[2] Delete a contact
[3] Show contacts
[4] Exit program
What function would you like to use?
2
You chose to delete a contact.
Which contact would you like to delete? Specify by contact number. 0
Contact deleted
Phone Book
[1] Add a contact
[2] Delete a contact
[3] Show contacts
[4] Exit program
Однако контакт не действительно удален , он все еще присутствуетдаже опустошен в вашем списке, если я выполню команду 3 после удаления, которая выдаст:
You chose to show the contacts.
Contact #0
First name:
Last name:
Phone number: 0
Contact #1
First name: Test
Last name: 2
Phone number: 8901234
Вам нужно удалить запись из con .Вам также необходимо проверить правильность ранга удаляемого элемента.
Обратите внимание, что n странно , поскольку оно не содержит количество записейно еще одна, когда книга пуста, она уже имеет значение 1, затем 2 и т. д.
b избыточно с n , поскольку оно имеет значение n-1.Это индекс для FName и LName , но я не вижу интереса к этим двум двумерным массивам, вы можете напрямую scanf в con или просто определите их как простой массив символов.Лучший способ - удалить b и FName и LName .
DelCon также бесполезен, поскольку он простопромежуточное значение для установки a .
Функция никогда не используется.
Когда вы scanf строка ограничивает размерстрока ввода, чтобы не рисковать выходить из получателя.
Модифицированная версия, учитывающая мое предыдущее замечание:
int main() {
// Setting up variables
int Choice = 0;
int n = 0;
int size = 1;
struct contact *con = (struct contact *)malloc(size * sizeof(struct contact));
int a;
do { // Will loop through the main function until the user decides to exit the program
// Prints out the main menu of the phone book
printf("\nPhone Book");
printf("\n[1] Add a contact");
printf("\n[2] Delete a contact");
printf("\n[3] Show contacts");
printf("\n[4] Exit program");
printf("\n\nWhat function would you like to use?\n"); // Asks for user input
scanf("%d", &Choice);
switch (Choice) {
case 1: // Case to add a contact into the phone book
if (n == size)
{
size = size * 2;
con = (struct contact*)realloc(con, size * sizeof(struct contact));
}
// Records the information given into the structure
printf("\nYou chose to add a contact.");
printf("\nFirst name: ");
scanf("%9s", con[n].FirstName);
printf("\nLast name: ");
scanf("%9s", con[n].LastName);
printf("\nPhone number (Numbers only): ");
scanf("%d", &con[n].PhoneNum);
printf("\nRecord added to the phone book");
// Prints out the given information
printf("\n\nNew contact:");
printf("\nFirst name: %s", con[n].FirstName);
printf("\nLast name: %s", con[n].LastName);
printf("\nPhone number: %d", con[n].PhoneNum);
printf("\nContact number is %d", n);
printf("\n");
n += 1;
break;
case 2: // Case to delete a contact from the phone book
printf("\nYou chose to delete a contact.");
printf("\nWhich contact would you like to delete? Specify by contact number. ");
scanf("%d", &a);
if ((a < 0) || (a >= n))
printf("\ninvalid rank of contact");
else {
/* if you do not have bcopy use memmove */
bcopy(&con[a+1], &con[a], (n - 1 - a) * sizeof(struct contact));
n -= 1;
printf("\nContact deleted");
}
printf("\n");
break;
case 3: // Case to see all of the entered contacts
printf("\nYou chose to show the contacts.");
for (a = 0; a < n; a++) {
printf("\nContact #%d", a);
printf("\nFirst name: %s", con[a].FirstName);
printf("\nLast name: %s", con[a].LastName);
printf("\nPhone number: %d", con[a].PhoneNum);
printf("\n");
}
break;
case 4:
puts("\nGoodbye!");
break;
default:
puts("\ninvalid choice");
}
} while (Choice != 4);
return 0;
}
Компиляция и выполнение:
pi@raspberrypi:/tmp $ gcc -pedantic -Wextra b.c
pi@raspberrypi:/tmp $ ./a.out
Phone Book
[1] Add a contact
[2] Delete a contact
[3] Show contacts
[4] Exit program
What function would you like to use?
1
You chose to add a contact.
First name: test
Last name: 1
Phone number (Numbers only): 1234567
Record added to the phone book
New contact:
First name: test
Last name: 1
Phone number: 1234567
Contact number is 0
Phone Book
[1] Add a contact
[2] Delete a contact
[3] Show contacts
[4] Exit program
What function would you like to use?
1
You chose to add a contact.
First name: Test
Last name: 2
Phone number (Numbers only): 8901234
Record added to the phone book
New contact:
First name: Test
Last name: 2
Phone number: 8901234
Contact number is 1
Phone Book
[1] Add a contact
[2] Delete a contact
[3] Show contacts
[4] Exit program
What function would you like to use?
3
You chose to show the contacts.
Contact #0
First name: test
Last name: 1
Phone number: 1234567
Contact #1
First name: Test
Last name: 2
Phone number: 8901234
Phone Book
[1] Add a contact
[2] Delete a contact
[3] Show contacts
[4] Exit program
What function would you like to use?
2
You chose to delete a contact.
Which contact would you like to delete? Specify by contact number. 2
invalid rank of contact
Phone Book
[1] Add a contact
[2] Delete a contact
[3] Show contacts
[4] Exit program
What function would you like to use?
2
You chose to delete a contact.
Which contact would you like to delete? Specify by contact number. 0
Contact deleted
Phone Book
[1] Add a contact
[2] Delete a contact
[3] Show contacts
[4] Exit program
What function would you like to use?
3
You chose to show the contacts.
Contact #0
First name: Test
Last name: 2
Phone number: 8901234
Phone Book
[1] Add a contact
[2] Delete a contact
[3] Show contacts
[4] Exit program
What function would you like to use?
4
Goodbye!
pi@raspberrypi:/tmp $