tasks a-s

Task/Queue-Definition/AWK/queue-definition.awk

@@ -0,0 +1,32 @@
+#!/usr/bin/awk -f
+
+BEGIN {
+    delete q
+    print "empty? " emptyP()
+    print "push " push("a")
+    print "push " push("b")
+    print "empty? " emptyP()
+    print "pop " pop()
+    print "pop " pop()
+    print "empty? " emptyP()
+    print "pop " pop()
+}
+
+function push(n) {
+    q[length(q)+1] = n
+    return n
+}
+
+function pop() {
+    if (emptyP()) {
+        print "Popping from empty queue."
+        exit
+    }
+    r = q[length(q)]
+    delete q[length(q)]
+    return r
+}
+
+function emptyP() {
+    return length(q) == 0
+}