SUDOKU SOLVER

[mormech]

hi to all
I am a mechanic engineer and I had written a program to solving Sudoku,
and if your sudoku have more than one answer,it will be show all nswers;
But if you enter an empty sudoku,computer most claculate your answers in"for loop" for 9^81 times.
Is there any way to solve this problem?
thank you.

[Peter87]

Showing all answers is pointless because no one is going to look at all of them. Easiest is just to set a limit on how many solutions that you calculate. Another way is to show one or a few solutions at the same time and let the user press a button to see other solutions. For that to work you can build the solver in a way that makes it possible for it to run until it finds N answers, and be able to later continue the calculation from where it was. Each time the user press the button you just ask the solver for more solutions.

[newkid93]

how do you even write programs like that? i have always wanted to learn but never found out

[mormech]

Thank you Peter87
But I had wrote to my program if you find one answer:Break;
But it also had the same problem...
I ensure that my solution has no problem!!!

[Lowest0ne]

What is your input method? Depending upon the method you might be trying to solve something that isn't there (you never solve anything, no break).

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