labs 1-6: init

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

lab4/12.cpp

@@ -0,0 +1,33 @@
+#include <algorithm>
+#include <iostream>
+using namespace std;
+
+class Foo;
+class Bar;
+
+class Foo {
+private:
+  int foo;
+
+public:
+  Foo(int n) { foo = n; }
+  friend int bigger(Foo, Bar);
+};
+
+class Bar {
+private:
+  int bar;
+
+public:
+  Bar(int n) { bar = n; }
+  friend int bigger(Foo, Bar);
+};
+
+int bigger(Foo a, Bar b) { return max(a.foo, b.bar); }
+
+int main() {
+  Foo a(5);
+  Bar b(55);
+
+  cout << bigger(a, b);
+}