Read to array from table in text file, while skipping specific column - c++

Question

I am trying to read the contents of a text file into 2D array in C++. The file contains 125 rows with 21 columns of integers (a table of integers). I'm to read this into an array that is 125 rows of 20 columns, skipping column 21 of the file.
I defined the size of the array with variables, but it just reads column 21 into the next row, ignoring the new line. I need it to start each row in the array at the start of the new line from the file but ignore the last item in the table.
I'm not sure if I'm looking for it to skip column 21, or if I'm looking for it to start reading each column at a new line (or both?)
Text file looks like (is this called a matrix?) and it's number separated by 1 space and \n at end.
(The text file was generated by a program to generate rows of 20 numbers and the sum.)
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 93
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 93
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 93
" etc
Other solutions I've found can be difficult for me to understand because people write their variables and functions non-descriptively. Some solutions require advanced methods I'm not supposed to use as well, such as vectors and string manipulation. I have currently learned everything before "pointers" so I can only use solutions I've learned in class. I've learned functions, arrays, search/sort, and basics like operators, loops, variables, etc. I'm not supposed to use vectors for this or string manipulation.
I will (eventually) have to sum the numbers in the array (after I extract the first 20 of each row from the file) so to compare the sum from the array final column to the last integer in each row of the file (which is a sum).
My function is (note: We are using namespace std)
void readArray() {
ifstream infile("tableofintegers.txt");
for (int rowcount = 0; rowcount < ROWS; rowcount++) // row loop
{
for (int colcount = 0; colcount < COLS; colcount++) // column loop
{
infile >> twoDArray[rowcount][colcount]; // read to array
}
}
}
These are variables:
const int ROWS = 125;
const int COLS = 20;
I tried this but got a runtime error
file >> array[row][col];
file.ignore(10, '\n');
The error when I tried file.ignore
C:\path\matrix.exe (process 27316) exited with code -2147483645.
Not only is there an error, but it still "wraps" the read starting line two with the sum (last digit) of line 1.) As you can imagine, as this iterates, it keeps pushing the data over further and further.
I expected for the program to stop reading when it reached the limit of the array columns (20) then continue at the next line, but it didn't. My brain tells me something's not logical about that expectation, yet I have a dissonance or something going on. I can't really wrap my head around it. I also tried file.ignore which I expected would ignore 10 characters after the 20th column up to new line, but it just kicked an error and still wrapped.
Note: I'm printing the array to the console. Here is my code for that.
for (int row = 0; row < ROWS; row++)
{
for (int col = 0; col < COLS; col++)
{
cout << setw(5) << dataArray[row][col];
}
cout << endl;
}