Add AddressBook in c

Author: DataEraserC

c/AddressBook/main.c

@@ -0,0 +1,192 @@
+// fishc
+// Code Check is required bcs DataEraser did't do that
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct Person
+{
+    char name[20];
+    char phone[40];
+    struct Person *next;
+};
+void getInput(struct Person *person);
+void printPerson(struct Person *person);
+void addPerson(struct Person **contacts);
+void changePerson(struct Person *contacts);
+void delPerson(struct Person **contacts);
+struct Person *findPerson(struct Person *contacts);
+void displayContacts(struct Person *contacts);
+void releaseContacts(struct Person **contacts);
+int main()
+{
+    short code;
+    struct Person *contacts = NULL;
+    printf("|Welcome to ContactsBook Manager Program|\n");
+    printf("|1:insert new Contact-------------------|\n");
+    printf("|2:find for existing Contact------------|\n");
+    printf("|3.change existing Contact information--|\n");
+    printf("|4.delete existing Contact--------------|\n");
+    printf("|5.display all Contact------------------|\n");
+    printf("|6.exit---------------------------------|\n");
+    while (1)
+    {
+        printf("Please input the command code:\n");
+        scanf("%d", &code);
+        switch (code)
+        {
+        case 1: {
+            addPerson(&contacts);
+            break;
+        }
+        case 2: {
+            struct Person *person = findPerson(contacts);
+            if (person != NULL)
+            {
+                printPerson(person);
+            }
+            else
+            {
+                printf("The person is not found\n");
+            }
+            break;
+        }
+        case 3: {
+            changePerson(contacts);
+            break;
+        }
+        case 4: {
+            delPerson(&contacts);
+            break;
+        }
+        case 5: {
+            displayContacts(contacts);
+            break;
+        }
+        case 6: {
+            goto END;
+            break;
+        }
+        default: {
+            break;
+        }
+        }
+    }
+END:
+    releaseContacts(&contacts);
+}
+void getInput(struct Person *person)
+{
+    printf("Please input name:\n");
+    scanf("%s", person->name);
+    // Bounds Check Elimination is required
+    printf("Please input phone number:\n");
+    scanf("%s", person->phone);
+    // Bounds Check Elimination is required
+}
+void printPerson(struct Person *person)
+{
+    printf("Name:\n%s\n", person->name);
+    printf("Phone number:\n%s\n", person->phone);
+}
+void addPerson(struct Person **contacts)
+{
+    struct Person *person = (struct Person *)malloc(sizeof(struct Person));
+    if (person == NULL)
+    {
+        printf("ERROR: malloc failed");
+        exit(1);
+    }
+    if (contacts != NULL)
+    {
+        getInput(person);
+        person->next = *contacts;
+        *contacts = person;
+    }
+    else
+    {
+        *contacts = person;
+        person->next = NULL;
+    }
+}
+struct Person *findPerson(struct Person *contacts)
+{
+    printf("Please input the name:\n");
+    char temp[20];
+    scanf("%s", temp);
+    // Bounds Check Elimination is required
+    struct Person *current = contacts;
+    while (current != NULL && strcmp(current->name, temp))
+    {
+        current = current->next;
+    }
+    if (current != NULL)
+    {
+        printf("Name:\n%s\n", current->name);
+        printf("Phone number:\n%s\n", current->phone);
+    }
+    else
+    {
+        printf("Not Found\n");
+    }
+
+    return current;
+}
+void changePerson(struct Person *contacts)
+{
+    struct Person *current = findPerson(contacts);
+    if (current != NULL)
+    {
+        printf("Please input new Phone number:\n");
+        scanf("%s", current->phone);
+        // Bounds Check Elimination is required
+        printf("Done");
+    }
+    else
+    {
+        printf("Not Found\n");
+    }
+}
+void delPerson(struct Person **contacts)
+{
+    struct Person *person = findPerson(*contacts);
+    if (person == NULL)
+    {
+        printf("Not Found");
+    }
+    else
+    {
+        struct Person *current = *contacts;
+        if (current == person)
+        {
+            *contacts = current->next;
+            // the first struct is target
+        }
+        else
+        {
+            while (current->next != person)
+            {
+                current = current->next;
+            }
+            current->next = current->next->next;
+        }
+    }
+}
+void displayContacts(struct Person *contacts)
+{
+    while (contacts != NULL)
+    {
+        printPerson(contacts);
+        contacts = contacts->next;
+    }
+}
+void releaseContacts(struct Person **contacts)
+{
+    struct Person *temp = *contacts;
+    while (*contacts != NULL)
+    {
+        temp = *contacts;
+        *contacts = (*contacts)->next;
+        free(temp);
+    }
+}