Problem with detecting wrong user input

[Void life]

Hello guys,
Im writing a function to allow the user to input the contents of a matrix.

  void matrix_input(double A_matrix[], int dimensions, char name)
{   bool correct_input = false;
    cout<<"Enter the elements of the "<<dimensions<<"x"<<dimensions<<" matrix "<<name<<endl;
    for(int i = 0; i<dimensions; ++i)
    {
        for(int j = 0; j<dimensions; ++j)
        { while(!correct_input)
        {
            correct_input = true;
            cout<<name<<"("<<i+1<<j+1<<") = ";
            cin>>A_matrix[i*dimensions+j];
            if(cin.fail())
            {
                cin.clear();
                cin.ignore(numeric_limits<streamsize>::max(),'\n');
                cout<<"ERROR!\nwrong input\nPlease enter a REAL NUMBER only.\n";
                correct_input = false;
            }
        }

        }
        cout<<endl;

When i call this function, it works perfectly fine when I remove all the error checking stuff to see if the input is actually a double. But with it the function only asks the user to enter the very first value of the matrix and then ends. I don't really understand why or how this is happening.
I also have a question about cin.ignore(numeric_limits<streamsize>::max(),'\n');
Im a bit confused about type streamsize. Looking it up i found that it is the type to represent sizes and character counts in streams. Does cin.ignore(numeric_limits<streamsize>::max(),'\n');
mean that it will ignore 2147483648 characters or that many digits after the first 1?
Any help is always appreciated. Thanks.
Void~

[coder777]

I don't really understand why or how this is happening.

Show the code where the problem occures.

mean that it will ignore 2147483648 characters or that many digits after the first 1?

No, ignore() indeed does this: ignoring/discarding all characters until '\n'

See:
http://www.cplusplus.com/reference/istream/istream/ignore/

[Void life]

The problem is with the code I posted above(unless I'm making some mistake in calling the function). Say if I do something like this

int main()
{
int Size; 
cin>>Size; 
double matrix_a [Size*Size], matrix_b[Size*Size]; 
matrix_input(matrix_a, size, 'A');
matrix_input(matrix_b, size, 'B');// matrix_input being the function I posted originally 
return 0;
}

Say I input size to be 2. The program then asks me to enter A(1,1) and then asks me to enter B(1,1). Completely skipping over all the other elements.
Yes I know ignore will discard all characters till a new line but doest something like cin.ignore(80, '\n'); ignore 80 characters or to a newline, whichever comes first? Kindof why I'm a bit confused over streamsize. Returning numeric_limit<streamsize>::max() I got 2147483647. What difference would it make if I replace streamsize with int or double?

[Void life]

i figured it out , thanks guys. Just a silly mistake. Here's the corrected version

 void matrix_input(double A_matrix[], int dimensions, char name)
{   bool correct_input = false;// Should have been after the 2nd for loop
    cout<<"Enter the elements of the "<<dimensions<<"x"<<dimensions<<" matrix "<<name<<endl;
    for(int i = 0; i<dimensions; ++i)
    {
        for(int j = 0; j<dimensions; ++j)
        {  bool correct_input = false;
            while(!correct_input)
        {
            correct_input = true;
            cout<<name<<"("<<i+1<<j+1<<") = ";
            cin>>A_matrix[i*dimensions+j];
            if(cin.fail())
            {
                cin.clear();
                cin.ignore(numeric_limits<streamsize>::max(),'\n');
                cout<<"ERROR!\nwrong input\nPlease enter a REAL NUMBER only.\n";
                correct_input = false;
            }
        }

        }
        cout<<endl;