Unable to print the reverse of a user-filled partial array - c++

Question

For an assignment, we were to fill an array with user-defined characters that stops filling once the user enters a full stop ".". Part of the assignment is to print out the characters entered in the array in reverse, but what I have seems to just print nothing.
First time asking, so apologies if it's a silly question. Thanks in advance.
#include <iostream>
using namespace std;
//Function declarations
bool fillArray(char charArray[], int arraySize, int& numberUsed);
void outputInReverse(const char charArray[], int& numberUsed);
int main() {
const int arraySize = 100;
char charArray[arraySize] = { };
int numberUsed = 0;
//Function calls
cout << "\nFILLING ARRAY....\n";
fillArray(charArray, arraySize, numberUsed);
cout << "\nARRAY OUTPUT....\n";
outputInReverse(charArray, numberUsed);
}
//Function definitions
bool fillArray(char charArray[], int arraySize, int& numberUsed) {
char inputChar;
int index = 0;
const char sentinel = '.';
bool sentinelEntered = false;
bool arrayFull = false;
int count = 0;
//Take user input
for (int i = 0; i < arraySize; i++) {
if ((!sentinelEntered)) {
cout << "Enter up to " << arraySize << " character values. Enter full stop to end. " << "Enter char " << (i + 1) << ": " << endl;
cin >> inputChar;
charArray[index] = inputChar;
//How many entries made
numberUsed = i;
count++;
if ((inputChar == sentinel)) {
sentinelEntered = true;
cout << "Number of entries: " << (count - 1) << endl;
return count;
}
}
}
if (numberUsed == arraySize) {
arrayFull = true;
return arrayFull;
}
return sentinelEntered;
return count;
}
// Reverse
void outputInReverse(const char charArray[], int& numberUsed) {
for (int i = numberUsed; i > 0; i--) {
cout << "Output in reverse: " << charArray[i] << endl;
}
}
FILLING ARRAY....
Enter up to 100 character values. Enter full stop to end. Enter char 1:
a
Enter up to 100 character values. Enter full stop to end. Enter char 2:
b
Enter up to 100 character values. Enter full stop to end. Enter char 3:
c
Enter up to 100 character values. Enter full stop to end. Enter char 4:
d
Enter up to 100 character values. Enter full stop to end. Enter char 5:
e
Enter up to 100 character values. Enter full stop to end. Enter char 6:
.
Number of entries: 5
ARRAY OUTPUT....
Output in reverse:
Output in reverse:
Output in reverse:
Output in reverse:
Output in reverse:

Answer 1

Not sure what you are trying to return from fillArray(), but since its a bool type, assuming you are trying to return if the array is empty or not. Observe added comments to see corrections.
int main() {
const int arraySize = 100;
//corrected
char charArray[arraySize] = { NULL };
int numberUsed = 0;
//Function calls
cout << "\nFILLING ARRAY....\n";
fillArray(charArray, arraySize, numberUsed);
cout << "\nARRAY OUTPUT....\n";
outputInReverse(charArray, numberUsed);
return 0;
}
bool fillArray(char charArray[], int arraySize, int& numberUsed) {
char inputChar;
int index = 0;
const char sentinel = '.';
bool sentinelEntered = false;
bool arrayFull = false;
int count = 0;
//Take user input
for (int i = 0; i < arraySize; i++) {
if ((!sentinelEntered)) {
cout << "Enter up to " << arraySize << " character values. Enter full stop to
end. " << "Enter char " << (i + 1) << ": " << endl;
cin >> inputChar;
//corrected: shifted here so before '.' can enter into array we return
if ((inputChar == sentinel)) {
sentinelEntered = true;
cout << "Number of entries: " << (count) << endl;
//correction: update numberUsed before returning and no of
//elements = count
numberUsed = i;
return count;
}
//correction: array index should not be "index" but i
charArray[i] = inputChar;
//How many entries made
numberUsed = i;
count++;
}
}
if (numberUsed == arraySize)
return true;
return false;
}
void outputInReverse(const char charArray[], int& numberUsed) {
for (int i = numberUsed-1; i >= 0; i--) {
cout << "Output in reverse: " << charArray[i] << endl;
}
}