Queue(Char array base)

//https://vk.com/evgenykravchenko0

                ___                                        ___                   ___
               /  /\                  ___                 /  /\                 /  /\
              /  /:/_                /__/\               /  /:/_               /  /:/_
             /  /:/ /\               \  \:\             /  /:/ /\             /  /:/ /\
            /  /:/ /:/_               \  \:\           /  /:/_/::\           /  /:/ /:/_
           /__/:/ /:/ /\          ___  \__\:\         /__/:/__\/\:\         /__/:/ /:/ /\
           \  \:\/:/ /:/         /__/\ |  |:|         \  \:\ /~~/:/         \  \:\/:/ /:/
            \  \::/ /:/          \  \:\|  |:|          \  \:\  /:/           \  \::/ /:/
             \  \:\/:/            \  \:\__|:|           \  \:\/:/             \  \:\/:/
              \  \::/              \__\::::/             \  \::/               \  \::/
               \__\/                   ~~~~               \__\/                 \__\/
                            ___
                           /__/\                ___                 ___
                           \  \:\              /  /\               /  /\
                            \  \:\            /  /:/              /  /:/
                        _____\__\:\          /__/::\             /__/::\
                       /__/::::::::\         \__\/\:\__          \__\/\:\__
                       \  \:\~~\~~\/            \  \:\/\            \  \:\/\
                        \  \:\  ~~~              \__\::/             \__\::/
                         \  \:\                  /__/:/              /__/:/
                          \  \:\                 \__\/               \__\/
                           \__\/

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

#define MAX_SIZE 50

char* push ( char *str, int *p);
void status ( char *str, int elem);
char* pop ( char *str, int *p);

int main ( int argc, const char * argv[]) {
    int elem        = 0;
    int *p;
    p = &elem;

    char *str       = NULL;
    int pressed_key = 0;

    do {
        printf("          MENU\n");
        printf("1. Add symbol in queue..\n");
        printf("2. Queue status..\n");
        printf("3. Delete symbol from queue..\n");
        printf("4. Exit..\n\n");

        printf("Enter number.. - ");
        scanf("%d", &pressed_key);
        if (pressed_key == 1) {
            str = push(str, p);
            printf("\n%d", elem);
        }
        if (pressed_key == 2) {
            status(str, elem);
            printf("\n%d", elem);
        }
        if (pressed_key == 3) {
            str = pop(str, p);
            printf("\n%d", elem);
        }
    } while (pressed_key != 4);

    return 0;
}

char* push (char *str, int *p) {
    if (MAX_SIZE == *p) {
        printf("\nQueue is full.\n");
        getchar();
        getchar();
    }
    else {
        printf("\n\nEnter symbol to add in queue: ");

        if (str == NULL) {
            str = (char*)malloc((*p + 1) * sizeof(char));
        }
        else
            str = (char*)realloc(str, (*p + 1) * sizeof(char));


        scanf(" %c", &str[*p]);
        *p += 1;
    }

    return str;


}

void status( char *str, int elem) {
    if (elem == 0) {
        printf("\nQueue is empty.\n\n");
    }
    else
        printf("\n Queue: ");

        for (int i = 0; i < elem; i++) {
            printf("%c", str[i]);
        }
    getchar();
    getchar();
    printf("\n");
}

char* pop (char *str, int *p) {
    if (*p != 0) {
        char *temp = str;
        char *arr;
        printf("Deleted element: ");
        printf("\n%p\n", temp);
        printf("%p\n", str);
        if (str != NULL) {
            printf("%c\n", *temp);
        }

        for (int i = 1; i < *p; i++) {
            str[i - 1] = str[i];
        }
        *p -= 1;
        arr = (char*)malloc(*p * sizeof(char));

        for (int i = 0; i < *p; i++) {
            arr[i] = str[i];
        }
        free(str);
        str = (char*)malloc(*p * sizeof(char));

        for (int i = 0; i < *p; i++) {
            str[i] = arr[i];
        }
    }
    else {
     printf(" \nQueue is empty\n");

    }
    getchar();
    getchar();

    return str;

}