Update disadvantages.md

Author: kspalaiologos

book/languages/c/disadvantages.md

@@ -1 +1,13 @@
 # Disadvantages
+
+C has no support for closures, no guaranteed support of tail calls
+
+There is no way to portably inspect the call stack. Hence, you cannot code something like GNU backtrace or `longjmp`/`setjmp` in
+portable C. Also, coding precise garbage collectors is very painful.
+
+There is no ABI, every vendor made up their own. Higher level constructs have to be manually created or third-party libraries and
+other solutions used.
+
+There are no namespaces, so it's easy to pollute global namespace and wreck something up.
+
+Finally, C doesn't support exceptions and object oriented programming.