(c++) trying to read numbers into array, getting junk numbers on output - c++

Question

I've searched and searched this topic and still nothing so I'm resorting to this.
NOTE: Can't use vectors at all
So I'm trying to open up a text file in this program and read the numbers into an array. The program opens it up, and reads them (I'm assuming), but when I read the numbers the back, they are junk numbers. Not really sure where it went wrong, would appreciate some help. Here's my code:
#include <iostream>
#include <iomanip>
#include <fstream>
using namespace std;
void readNumbers(int numbers[]);
const int MAX_SIZE = 12;
int main()
{
int numbers[MAX_SIZE];
readNumbers(numbers);
for (int i = 0; i < MAX_SIZE; i++)
{
cout << numbers[i] << endl;
}
return 0;
}
void readNumbers(int numbers[])
{
int num = 0;
ifstream inFile;
inFile.open("numbers.txt");
if (!inFile)
{
cout << "Cannot open the file" << endl;
}
else
{
inFile >> num;
while(inFile)
{
int i = 0;
numbers[i] += num;
i++;
inFile >> num;
}
}
inFile.close();
}
Output:
1606416400
32767
0
0
0
0
0
0
0
0
0
0

Answer 1

The i variable is local to the loop. Try moving it outside:
int i = 0;
while(inFile)
{
numbers[i] += num;
i++;
inFile >> num;
}

Answer 2

Your array numbers[] is not initialized and you are incrementing nothing but garbage values numbers[i] += num;
hence it prints junk numbers.
If incrementing is important use:
int numbers[MAX_SIZE]={0} //while declaration
If not:
numbers[i]=num //inside while
Also int i=0 should be outside while as i will always be 0 inside while.

Answer 3

You're not initializing your numbers array, so it'll have garbage in it. Why are you using += when storing num in numbers[i]? Shouldn't you be using an assignment there?
numbers[i] = num;
(And also, as previously mentioned, the i index needs to be declared outside the loop, otherwise you're always adding/assigning to the first element in numbers.)

Answer 4

fixed few errors in usage of array.
#include <iostream>
#include <iomanip>
#include <fstream>
using namespace std;
void readNumbers(std::string* numbers);
const int MAX_SIZE = 12;
int nSize = 0;
int main()
{
std::string numbers[MAX_SIZE];
readNumbers(numbers);
for (int i = 0; i < nSize; i++)
{
cout << numbers[i] << endl;
}
return 0;
}
void readNumbers(std::string* numbers)
{
ifstream inFile;
inFile.open("numbers.txt");
if (!inFile)
{
cout << "Cannot open the file" << endl;
}
else
{
while(!inFile.eof())
{
char temp[100] = {0};
inFile.getline(temp, 100);
numbers[nSize++].assign(temp);
if (nSize == MAX_SIZE) break;
}
}
inFile.close();
}