restructure and add ipi texs

2019-11-06 18:24:04 +01:00
parent e21da561fc
commit 8fd8d2a485
155 changed files with 129 additions and 0 deletions
@@ -0,0 +1,56 @@
+#include "fcpp.hh"
+#include <string>
+
+const int board_size = 8;         // globale Konstante
+typedef int columns[board_size];  // neuer Datentyp "columns"
+
+bool good_position (int new_row, columns queen_cols, int new_col)
+{
+  for (int row=0; row<new_row; row=row+1)
+    if ((queen_cols[row] == new_col) ||
+	(new_row-row == abs(queen_cols[row]-new_col)))
+      return false;
+  return true;
+}
+
+void display_board (columns queen_cols)
+{
+  for (int i=0; i<board_size; i=i+1)
+    {
+      std::string s("");
+      for (int j=0; j<board_size; j=j+1)
+        if (j!= queen_cols[i])
+          s = s + ".";
+        else
+          s = s + "D";
+      print(s);
+    }
+  print(" ");
+}
+
+int queen_configs (int row, columns queen_cols)
+{
+  if (row == board_size) {
+    display_board (queen_cols);
+    return 1;
+  }
+  else {
+    int nr_configs = 0;
+    for (int col=0; col<board_size; col=col+1)
+      if (good_position (row, queen_cols, col))
+        {
+          queen_cols[row] = col;
+          nr_configs = nr_configs +
+            queen_configs (row+1, queen_cols);
+        }
+    return nr_configs;
+  }
+}
+
+int main ()
+{
+  columns queen_cols;
+  print("Anzahl Loesungen");
+  print(queen_configs(0,queen_cols));
+  return 0;
+}