feat: update structure

cs2106/labs/lab1/part1/queue.h

@@ -0,0 +1,17 @@
+
+// Maximum number of elements in a queue
+//
+#define MAX_Q_SIZE	10
+
+// Place function prototypes here.
+
+void enq(double);
+double deq();
+
+void sum(double);
+void prod(double);
+void clear_sum();
+void clear_prod();
+double reduce();
+
+double flex_reduce(void (*)(), void (*)(double));