Getting stuck in getIntLimited function - c

Question

i have a problem in getting stuck in getIntLimited function. In adjustQuantity i need it to check if user entered the right number, not more or less than needed and not letters. I didn't do that to "Stock" option, only in "Check" option. But my first problem is that i have to type the number twice to get a response from it and the second is that i can't get out of the getIntLimited loop.
Here's the image of the output:
and the part of my code:
void GroceryInventorySystem(void){
struct Item Items[MAX_ITEM_NO];
int opt, records;
int loop = 0;
welcome();
while(!loop){
if(opt == 3){
adjustQuantity(Items, records, CHECKOUT);
saveItems(Items, DATAFILE, records);
if(0 == saveItems(Items, DATAFILE, records)){
printf("Could not update data file %s\n", DATAFILE);
}
pause();
}
}
int getInt(void){ // Check if user entered the character and breaks, returns the value if a number //
char letter = 'x';
int value;
while(1){
scanf("%d%c", &value, &letter);
if(letter != '\n'){
printf("Invalid integer, please try again: ");
flushKeyboard();
}else{
return value;
}
}
}
int getIntLimited(int lowerLimit, int upperLimit){ // Check if user typed the value higher/lower and repeats. Returns the value if user entered the right number //
int Value;
while(1){
Value = getInt();
if(Value <= lowerLimit || Value >= upperLimit){
printf("Invalid value, %d < value < %d: ", lowerLimit, upperLimit);
}else{
return Value;
}
}
}
void adjustQuantity(struct Item item[], int NoOfRecs, int stock) {
int check, sku, index, opt;
char tostock[] = "to stock", tocheck[] = "to checkout";
printf("Please enter the SKU: ");
scanf("%d", &sku);
check = locateItem(item, NoOfRecs, sku, &index);
if (check == 0) {
printf("Item not found!\n");
} else {
displayItem(item[index], FORM);
if (stock == STOCK) {
printf("Please enter the quantity %s; Maximum of %d or 0 to abort: ", tostock, MAX_QTY - item[index].quantity);
scanf("%d", &opt);
if (opt == 0) {
printf("--== Aborted! ==--\n");
} else {
item[index].quantity += opt;
printf("--== Stocked! ==--\n");
}
} else {
printf("Please enter the quantity %s; Maximum of %d or 0 to abort: ", tocheck, item[index].quantity);
scanf("%d", &opt);
if (opt == 0) {
printf("--== Aborted! ==--\n");
} else if (item[index].quantity < opt){
opt = getIntLimited(item[index].quantity, 0);
} else {
item[index].quantity -= opt;
printf("--== Checked out! ==--\n");
if (item[index].quantity <= opt) {
printf("Quantity is low, please reorder ASAP!!!\n");
}
}
}
}
}

Answer 1

i did a mistake in opt = getIntLimited(0, item[index].quantity); it should be the opposite like this opt = getIntLimited(item[index].quantity, 0); now it exits out of the loop whenever i type the right number in between 0 and 5 .
I also putted opt = getIntLimited(0, item[index].quantity); instead of scanf, and removed else if statements