Write a method named unflatten that accepts three parameters: a reference to a Vector of integers, and a number of rows and columns.
Your method should convert the vector into a Grid with the given number of rows and columns, where values are transferred in row-major order into the grid.
For example, if the given vector is declared:
Vector<int> v {3, 8, 12, 2, 9, 17, 43, -8, 46, 203, 14, 97};
Then the call of unflatten(v, 4, 3) should return the following grid:
{{ 3, 8, 12},
{ 2, 9, 17},
{ 43, -8, 46},
{203, 14, 97}}
The call of unflatten(v, 6, 2) should return the following grid:
{{ 3, 8},
{ 12, 2},
{ 9 17},
{ 43, -8},
{ 46, 203},
{ 14, 97}}
If the vector's contents do not fit exactly into a grid of the given dimensions, your method should throw an int exception.
Your code should work for a vector of any size.
Your method should not modify the vector that is passed in.
