Gets the number of rows and columns from the input stream. If rows <= MAX_ROWS and cols <= MAX_COLS, fills m with data from file; otherwise signals failure on stream is and sets m size to 0 x 0
What will be an ideal response?
```
istream& operator>> ( istream& is, Matrix& m )
{
int i, j;
is >> m.rows >> m.cols;
if (is.fail()) {
m.rows = 0;
m.cols = 0;
} else if (m.rows > MAX_ROWS || m.cols > MAX_COLS) {
is.setstate( ios::failbit );
m.rows = 0;
m.cols = 0;
} else {
for (i = 0; i < m.rows; ++i)
for (j = 0; j < m.cols; ++j)
is >> m.mat[i][j];
if (is.fail()) {
m.rows = 0;
m.cols = 0;
}
}
return is;
}
```
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