Write checkDiagonalRL function

src/main/c/VierGewinnt.c

@@ -202,6 +202,21 @@ int checkDiagonalLR(char board[ROWS][COLS], char player) {
 
 
 
+// Write checkDiagonalRL function
+int checkDiagonalRL(char board[ROWS][COLS], char player) {
+    for (int row = 0; row <= ROWS - 4; row++) {
+        for (int col = 3; col < COLS; col++) {
+            if (board[row][col] == player &&
+                board[row + 1][col - 1] == player &&
+                board[row + 2][col - 2] == player &&
+                board[row + 3][col - 3] == player) {
+                return 1;  // Gewonnen
+            }
+        }
+    }
+    return 0;
+}
+