dict C

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


typedef struct Map {
    uint id;
    char* value;
    struct Map *next;
} map;

map* head = NULL;

void add_elem(uint key, char* str){
    if (head == NULL){
        map* new = (map*) malloc (sizeof(map));
        head = new;
        new->id = key;
        new->value = (char*) malloc (strlen(str) + 1);
        strcpy(new->value, str);
        new->next = NULL;
        return;
    }

    map *tmp = head, *h = head;
    head = head->next;

    while (head){
        tmp = head;
        head = head->next;
    }

    map* new = (map*) malloc (sizeof(map));
    tmp->next = new;
    head = new;
    new->id = key;
    new->value = (char*) malloc (strlen(str) + 1);
    strcpy(new->value, str);
    new->next = NULL;

    head = h;
}

void pop(uint id){
    map* h = head;
    if (head == NULL){
        printf("Error!\n");
        exit(1);
    }

    map* tmp = head;
    head = head->next;
    if (head == NULL){
        head = tmp;
        free(head);
        return;
    }
    if (tmp->id == id){
        free(tmp);
        return;
    }

    while (head && head->id != id){
        tmp = head;
        head = head->next;
    }

    tmp->next = head->next;
    free(head);

    head = h;
    return;
}

char* get_value(uint id){
    map* h = head;
    map* tmp = head;

    if (tmp->id == id){
        head = h;
        return tmp->value;
    }
    head = head->next;
    while (head){
        if (head->id == id){
            head = h;
            return tmp->next->value;
        }
        tmp = head;
        head = head->next;
    }
    printf("id incorrect!\n");
    head = h;
    return NULL;

}

void check_map(){
    map* h = head;

    while (head){
        printf("Key: %d, value: %s\n", head->id, head->value);
        head = head->next;
    }
    head = h;
}

int main(){

    add_elem(23, "Hello world for this dict");
    add_elem(12, "ultron is so-so");
    add_elem(34, "Avengers are good");
    add_elem(33, "vision isnt create yet");

    check_map();

    pop(12);
    printf("\n");
    check_map();

    pop(23);
    printf("\n");
    check_map();
    printf("\n");


    add_elem(123, "Work map?");
    add_elem(234, "seems to work!");
    check_map();
    printf("\n");

    printf("Value:::: %s\n", get_value(33));

    return 0;
}