commit c91056c345f698370455f1b7535b3e11b7012108
Author: Klaas Börgmann <github@klaasboergmann.de>
Date:   Wed May 22 12:27:52 2024 +0200

    first commit

diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..5008ddf
Binary files /dev/null and b/.DS_Store differ
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..f59caf1
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,77 @@
+#include <iostream>
+#include<time.h>
+// #include<windows.h>
+using namespace std;
+int start[9][9] =
+{
+{ 0, 8, 0, 0, 2, 0, 5, 6, 0 },
+{ 0, 0, 0, 1, 0, 0, 0, 0, 7 },
+{ 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+{ 0, 5, 0, 0, 9, 0, 4, 0, 8 },
+{ 0, 0, 7, 8, 0, 0, 0, 0, 3 },
+{ 0, 9, 0, 0, 1, 0, 0, 5, 0 },
+{ 2, 0, 4, 0, 0, 0, 8, 0, 0 },
+{ 0, 6, 0, 0, 8, 5, 0, 0, 0 },
+{ 0, 0, 0, 2, 0, 0, 1, 0, 0 } 
+};
+
+bool isfine(int feld[9][9], int x, int y)
+{
+// doppelte Zahl in Zeile oder Spalte?
+for (int yi = 0; yi < 9; yi++)
+if (yi != y && feld[x][yi] == feld[x][y])
+return false;
+for (int xi = 0; xi < 9; xi++)
+if (xi != x && feld[xi][y] == feld[x][y])
+return false;
+
+// Neuner-Kästchen-Test
+int x1 = (x / 3) * 3;
+int y1 = (y / 3) * 3;
+for (int xk = x1; xk < x1 + 3; xk++)
+for (int yk = y1; yk < y1 + 3; yk++)
+if ((xk!=x || yk!=y) && feld[xk][yk]==feld[x][y])
+return false;
+
+return true;
+}
+
+bool nextone(int feld[9][9], int x, int y)
+{
+if (y == 9) { y = 0; x++; };
+if (x == 9) return true;
+
+if (feld[x][y] > 0)
+{
+if (!isfine(feld, x, y)) return false;
+return nextone(feld, x, y + 1);
+}
+else for (feld[x][y] = 1; feld[x][y] <= 9; feld[x][y]++)
+{
+if (!isfine(feld, x, y)) continue;
+if (nextone(feld, x, y + 1)) return true;
+}
+feld[x][y] = 0;
+return false;
+}
+
+int main(int argc, char **argv)
+{
+ clock_t time1, tstart;
+ 
+ tstart = clock();   
+if (nextone(start, 0, 0))
+{
+for (int x = 0; x < 9; x++)
+{
+for (int y = 0; y < 9; y++)
+	cout << start[x][y];
+	cout << endl;
+}
+}
+else cout << "Nope!" << endl;
+
+time1=clock();
+cout<<tstart<<" - " <<time1<<"*"<<CLOCKS_PER_SEC;
+return 0;
+}
diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..e69de29
diff --git a/sudoku b/sudoku
new file mode 100755
index 0000000..de8b409
Binary files /dev/null and b/sudoku differ
diff --git a/sudoku.py b/sudoku.py
new file mode 100644
index 0000000..2fa9e23
--- /dev/null
+++ b/sudoku.py
@@ -0,0 +1,57 @@
+start = [[0, 8, 0, 0, 2, 0, 5, 6, 0],
+        [0, 0, 0, 1, 0, 0, 0, 0, 7],
+        [0, 0, 0, 0, 0, 0, 0, 0, 0],
+        [0, 5, 0, 0, 9, 0, 4, 0, 8],
+        [0, 0, 7, 8, 0, 0, 0, 0, 3],
+        [0, 9, 0, 0, 1, 0, 0, 5, 0],
+        [2, 0, 4, 0, 0, 0, 8, 0, 0],
+        [0, 6, 0, 0, 8, 5, 0, 0, 0],
+        [0, 0, 0, 2, 0, 0, 1, 0, 0]]
+
+
+def isfine(feld, x, y):
+	for (int yi = 0; yi < 9; yi++):
+		if (yi != y && feld[x][yi] == feld[x][y]):
+			return false;
+	for (int xi = 0; xi < 9; xi++):
+		if (xi != x && feld[xi][y] == feld[x][y]):
+			return false;
+	x1 = (x / 3) * 3;
+	y1 = (y / 3) * 3;
+	for (int xk = x1; xk < x1 + 3; xk++):
+		for (int yk = y1; yk < y1 + 3; yk++):
+			if ((xk!=x || yk!=y) && feld[xk][yk]==feld[x][y]):
+				return false;
+
+	return true;
+}
+
+def nextone(feld, x, y):
+	if (y == 9):
+		y = 0; 
+		x++;
+	if (x == 9):
+		return true;
+	if (feld[x][y] > 0):
+		if (!isfine(feld, x, y)) return false;
+		return nextone(feld, x, y + 1);
+	else:
+		for (feld[x][y] = 1; feld[x][y] <= 9; feld[x][y]++):
+			if (!isfine(feld, x, y)) continue;
+			if (nextone(feld, x, y + 1)) return true;
+	feld[x][y] = 0;
+	return false;
+
+
+tstart = clock();   
+if (nextone(start, 0, 0)):
+	for (int x = 0; x < 9; x++):
+
+		for (int y = 0; y < 9; y++):
+			cout << start[x][y];
+			cout << endl;
+else:
+	print("Unmöglich!");
+
+time1=clock();
+print(tstart." - " .time1."*".CLOCKS_PER_SEC)