Linked List

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

typedef struct Person person_t;
typedef struct BankLine bank_line_t;

struct Person {
    char name[100];
    int age;
    person_t* next;
};

struct BankLine{
    char name[50];
    person_t* head;
    person_t* tail;
};

bank_line_t create_bank_line(char *name){
    bank_line_t new_line;
    strcpy(new_line.name,name);
    new_line.head = NULL;
    new_line.tail = NULL;
    return new_line;
}

person_t* create_person(char *name, int age){
    person_t* new_person = malloc(sizeof(person_t));
    strcpy(new_person->name, name);
    new_person->age = age;
    new_person->next = NULL;
    printf("😁 Someone appeared: %s (%d years old)\n",new_person->name,new_person->age);
    return new_person;
}

void add_person_to_line(char *name, int age, bank_line_t* bank_line){
    person_t* new_person = create_person(name, age);
    if (bank_line->head == NULL) {
        bank_line->head = new_person;
        printf("  👆 %s is the first person in the line\n",new_person->name);
    }
    if (bank_line->tail == NULL) {
        bank_line->tail = new_person;
        printf("  👇 %s is the last person in the line\n",new_person->name);
    }else{
        bank_line->tail->next = new_person;
        bank_line->tail = new_person;
        printf("  👇 %s went to the back of the line\n",new_person->name);
    }
}

void info(person_t *person){
    printf("  😃 \"My name is %s. I am %d years old. ", person->name, person->age);
    if (person->next != NULL){
        printf("The person after me is %s\"\n", person->next->name);
    }else{
        printf("No one comes after me in the line\"\n");
    }
}

void bank_line_info(bank_line_t* bank_line){
    printf("👀 This bank line is %s\n",bank_line->name);
    printf("👀 The person at the head of the line is %s (age %d years)\n",bank_line->head->name,bank_line->head->age);
    person_t* current_person = bank_line->head;
    while (current_person != NULL){
        info(current_person);
        current_person = current_person->next;
    }
}

void free_bank_line(bank_line_t* bank_line){
    printf("👀 Freeing the line \"%s\"\n",bank_line->name);
    person_t* current_person = bank_line->head;
    while(current_person!=NULL){
        person_t* next = current_person->next;
        free(current_person);
        current_person = next;
    }
}

int main(){
    bank_line_t rb_line = create_bank_line("Reepooblic Bank Line");

    add_person_to_line("David",17,&rb_line);
    add_person_to_line("Joash",26,&rb_line);
    add_person_to_line("Athaliah",18,&rb_line);
    add_person_to_line("Anita",36,&rb_line);

    bank_line_info(&rb_line);
    free_bank_line(&rb_line);

    return 0;
}