C++ Can't print certain words from Char array - c++

Question

Not sure how to phrase the question, but I'm making a program for an assignment, which we're not allowed to use pre-existing libraries besides input/output. We also can only use primitive data-types. I have to read a text file with words, remove all punctuation from the word, and then store those words in a 2D array of characters.
This problem seems to be that when a word starts with a non-alphabetic character, the whole word doesn't output when using cout << stack[top] but when I output each individual character with cout << stack[top][i], it produces the expected output.
'stack' is a 2D array which contains characters to make up words.
'top' is a variable to represent the length of stack
Code:
#include <iostream>
#include <fstream>
using namespace std;
// Function Prototypes
void push(char word[]);
char formatCharacter(char letter);
bool isAlphabet(char letter);
char toLowercase(char letter);
// Global Variables
const int STACK_SIZE = 50000;
const int WORD_SIZE = 30;
char stack[STACK_SIZE][WORD_SIZE];
int top = 0;
int words = 0;
int wordCount[STACK_SIZE];
int main(){
// Local Variables
char filename[20];
ifstream fin;
char word[WORD_SIZE];
// Get file input
cerr << "Please enter the name of the input file: ";
cin >> filename;
// Open file
fin.open(filename);
// Print error if file doesn't open, then quit the program.
if (!fin) {
cerr << "Error opening file " << filename << ". Program will exit." << endl;
return 0;
}
// Read the file into the stack
while (fin >> word) {
push(word);
}
// Close file
fin.close();
}
void push(char word[]){
if (top == STACK_SIZE) return;
int i = 0;
int j = 0;
do {
if (isAlphabet(word[i])){
word[i] = formatCharacter(word[i]);
stack[top][i] = word[i];
cout << stack[top][i]; // Output fine
j++;
}
i++;
} while (word[i]);
wordCount[words] = j;
//cout << stack[top] << ": " << wordCount[words] << endl; // Output incorrect
cout << endl;
top++;
words++;
return;
}
bool isAlphabet(char letter){
if ((letter < 'A' || letter > 'Z') && (letter < 'a' || letter > 'z')){
return false;
}
else{
return true;
}
}
char formatCharacter(char letter){
if ((letter < 'A' || letter > 'Z') && (letter < 'a' || letter > 'z')){
letter = '\0';
}
else{
if (letter >= 'A' && letter <= 'Z'){
letter = toLowercase(letter);
}
}
return letter;
}
char toLowercase(char letter){
letter = letter + 32;
return letter;
}
isAlphabet() just checks if it's an alphabetic character
formatCharacter() removes any punctuation by replacing the character with '\0', and also changes uppercase to lowercase.
Input:
Jabberwocky
'Twas brillig, and the slithy toves
Did gyre and gimble in the wabe:
All mimsy were the borogoves,
And the mome raths outgrabe.
Output when using cout << stack[top][i]:
jabberwocky
twas
brillig
and
the
slithy
toves
did
gyre
and
gimble
in
the
wabe
all
mimsy
were
the
borogoves
and
the
mome
raths
outgrabe
Output when using cout << stack[top]:
jabberwocky: 11
: 4
brillig: 7
and: 3
the: 3
slithy: 6
toves: 5
did: 3
gyre: 4
and: 3
gimble: 6
in: 2
the: 3
wabe: 4
all: 3
mimsy: 5
were: 4
the: 3
borogoves: 9
and: 3
the: 3
mome: 4
raths: 5
outgrabe: 8
Notice the word 'twas' is missing. I'd rather not loop through each character of each word to get the output I need. I'd appreciate any advice, thanks!

Answer 1

The simplest fix is to change:
stack[top][i] = word[i];
To:
stack[top][j] = word[i];
^ j not i here
This will ensure that the 'Twas ends up as twas and not \0twas.
Also, formatCharacter() should call isAlphabet() rather than repeat the condition.