Sudoku solver free software - by Don Cross

I have written a simple Sudoku puzzle solver for Windows. There is no fancy GUI; you have to open up a Command Prompt to run it. To feed it a puzzle, you create an input file using your favorite text editor (Notepad works just fine). The input file should have 9 lines. Each line should contain 9 characters: either a digit 1 through 9, or a period (.) for empty squares. - Contains the executable sudoku.exe plus a couple of sample puzzle files to get you started. - Microsoft Visual C++ source code and project file. This is for programmers who want to compile the code for themselves, or are just curious how I did this.