Program ends before I type A or D for bubble sorting

I am practising bubble sort, and try to arrange a sequence of numbers in array to be in ascending order or descending order. The questions asked to build a program that uses a single-dimension array to store 12 numbers input by user. After inputting the numbers, the user should see a menu with two options to sort and print the 12 numbers in ascending or descending order.

#define SIZE 12

//Bubble sort
//Loop to control number of passes
void Bubblesort(int a[SIZE]){
    for (unsigned int pass = 1; pass < SIZE; ++pass) {
        // loop to control number of comparisons per pass
        for (size_t i = 0; i < SIZE - 1; ++i) {
            // Compare adjacent elements and swap them if first element is greater than second element
            if (a[i] > a[i + 1]) {
                int hold = a[i];
                a[i] = a[i + 1];
                a[i + 1] = hold;
            }
        }
    }
}
// function main begins program execution
int main(){
    int a[SIZE];    //Define array
    char enter; //Define character input by user
    printf("Enter the elements of array\n");

    for(size_t i=0;i<SIZE;i++){
        scanf("%d", &a[i]);
    }

    puts("Data items in original order");
   // output original array
    for (size_t i = 0; i < SIZE; ++i){
        printf("%4d", a[i]);
        }
    void Bubblesort(int a[SIZE]);
    puts("\nDo you want to print out the elements in ascending order (press A) or in descending order (press D)?");
    scanf("%c", &enter);
    if(enter=='A'){
    puts("\nData items in ascending order");
    // output sorted array
    for (size_t i = 0; i < SIZE; ++i) {
         printf("%4d", a[i]);
        }
    } else if (enter=='D') {
    puts("\nData items in descending order");
    // output sorted array
    for (size_t i = 0; i < SIZE; ++i) {
        printf("%4d", a[SIZE-i-1]);
        }
    puts("");
    }
    else return 0;
}

This is the result shown in XCode:

Enter the elements of array
1 2 3 5 4 7 8 6 9 11 12 10
Data items in original order
   1   2   3   5   4   7   8   6   9  11  12  10
Do you want to print out the elements in ascending order (press A) or in descending order (press D)?
Program ended with exit code: 0

I expected I will type A or D when it asks 'Do you want to print out the elements in ascending order (press A) or in descending order (press D)', but it executes when the sentence is printed.