// create a new grid 
// dimension is implicitly determined by number of arguments
// grid = new Grid(m=10, n=10)

// array_x = array[]
// array_y = array[]
// grid.setAlpha_x(&array_x)
// grid.setAlpha_y(&array_y)

// float time
// grid.setTimestep(time)

// bc = new BoundaryCondition()
// grid.setBoundaryCondition(bc)



// create new simulation run
// int iterations
// bool csv = true
// bool explicit = true
// simulation = new Simulation(grid, iterations)
// simulation.setSolver(BTCS, Thomas)
// simulation.run()