arrElemManipulation

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

int * getArr(int *, int *);
void insertElemLast(int *, int, int *, int);
void insertElemFirst(int *, int, int *, int);
void deleteElem(int *, int, int *, int);

int main(){
    int arrSize, arrElem, num;
    int * arr = getArr(&arrSize, &arrElem);

    int i;
    printf("\nCurrent content of the Array (SIZE: %d, Available Space: %d): ", arrSize, arrSize-arrElem);
    for(i = 0; i < arrElem; i++){
        printf("%d ", *(arr + i));
    }


    int choice = 0;
    printf("\n\nArray element manipulation table:\n");
    printf("1. Input an element and insert it to the last index of the array, if there is space.\n");
    printf("2. Input an element and insert it to the first index of the array, if there is space.\n");
    printf("3. Delete an element in the array and shift the elements to fill the deleted space.\n\n");

    while(choice < 1 || choice > 3){
        printf("\nEnter number of your choice: ");
        scanf("%d", &choice);
    }

    printf("\nEnter the element: ");
    scanf("%d", &num);

    switch (choice)
    {
    case 1:
        insertElemLast(arr, arrSize, &arrElem, num);
        break;
    case 2:
        insertElemFirst(arr, arrSize, &arrElem, num);
        break;
    case 3:
        deleteElem(arr, arrSize, &arrElem, num);
        break;
    }

    printf("\n\nNew content of the Array (SIZE: %d, Available Space: %d): ", arrSize, arrSize-arrElem);
    for(i = 0; i < arrElem; i++){
        printf("%d ", *(arr + i));
    }

    return 0;
}

int * getArr(int * size, int * numElem){
    printf("Enter the size of the array: ");
    scanf("%d", size);
    int * allocArr = (int*)calloc(*size, sizeof(int));

    int i;
    do{
        printf("Enter the number of integers you want to input in the array: ");
        scanf("%d", numElem);
    }while(*numElem < 1 || *numElem > *size);

    printf("Enter the integer values: ");
    for(i = 0; i < *numElem; i++){
        scanf("%d", allocArr + i);
    }

    return allocArr;
}

void insertElemLast(int * A, int size, int * numElem, int num){
    if(size > *numElem){
        A[*numElem] = num;
        (*numElem)++;
    }else printf("There is not enough space to add the element.");
}

void insertElemFirst(int * A, int size, int * numElem, int num){
    if(size > *numElem){
        int x;
        for(x = *numElem; x > 0; x--){
            A[x] = A[x-1];
        }
        A[0] = num;
        (*numElem)++;
    }else printf("There is not enough space to add the element.");
}

void deleteElem(int * A, int size, int * numElem, int num){
    int x;
    for(x = 0; x < *numElem && A[x] != num; x++){}
    if(x < size){
        int y;
        for(y = x + 1; y < *numElem; y++){
            A[y-1] = A[y];
        }
        A[*numElem] = 0;
        (*numElem)--;
    }else printf("Element is not found in the array.");
}