A CPP Program that gives a solution for a Sudoku puzzle.
g++ sudoku.cpp
[./a.out (Linux) | a (Windows CMD)]
sudoku.cpp -> Gives one solution.
sudoku_all.cpp -> Gives multiple solution for the puzzle.
Note that if there's no solution to the Puzzle, the sudoku board will be displayed the same as that of the input (i.e., with empty spaces as dots).