Merge pull request #3 from aryaman0406/aryaman0406-patch-3

Create FooBar class for alternating output

Author: aryaman0406

Print FooBar Alternately

@@ -0,0 +1,30 @@
+class FooBar {
+private:
+    int n;
+    mutex m1,m2;
+public:
+    FooBar(int n) {
+        m2.lock();
+        this->n = n;
+    }
+
+    void foo(function<void()> printFoo) {
+        
+        for (int i = 0; i < n; i++) {
+            m1.lock();
+        	// printFoo() outputs "foo". Do not change or remove this line.
+        	printFoo();
+            m2.unlock();
+        }
+    }
+
+    void bar(function<void()> printBar) {
+        
+        for (int i = 0; i < n; i++) {
+            m2.lock();
+        	// printBar() outputs "bar". Do not change or remove this line.
+        	printBar();
+            m1.unlock();
+        }
+    }
+};