c++ - Problem with printing numbers from binary file

I am writing numbers from array to binary file, but somehow when I print file last number printing twice. I not sure is it problem with how I write or how I read.

This is how I write to the file

for (int k = i - 1; k>-1; k--) {
    file2.write(reinterpret_cast(&arr[k]), sizeof(int));
}

This how I read and print from the file

while ( file2 ) {
    int val;
    file2.read(reinterpret_cast(&val), sizeof val);
    cout << val << endl;
}

So, if array of numbers is 31 29 47, printing file will give

47 
29
31
31