private string solveResult(SudokuSolveState state)
{
switch (state)
{
case SudokuSolveState.Completed:
return("sudoku already completed");
case SudokuSolveState.Invalid:
return("invalid sudoku");
case SudokuSolveState.Unsolved:
return("cannot solve this sudoku with current knowledge");
case SudokuSolveState.UNKNOWN:
return("unknown state");
case SudokuSolveState.Solved:
return("solved");
default: throw new NotImplementedException(state.ToString());
}
}
private SudokuSolveResult(SudokuSolveState state)
{
this.state = state;
}
