Added tuple example.

tuple.cc

@@ -0,0 +1,18 @@
+#include <tuple>
+#include <iostream>
+
+using namespace std;
+
+// make a function that returns multiple values
+
+int main() {
+    tuple<int, int> c = make_tuple(5, 4);
+    cout << get<0>(c) << endl;
+
+    int a = 0;
+    int b = 1;
+    cout << a << endl;
+    cout << b << endl;
+    // swap a, b
+    // get a,b from func ...
+}