move exercises, lecture examples, labs into subfolders

Exercises/C6/inc_dec_examples.c

@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void)
+{
+    // Declare some variables
+    int  a, b;
+
+    // Note: Order of a,b indicates the order in which operations are carried out on execution
+    
+    // Increment operators
+    b = 3;
+    a = ++b;    // b is now 4, a is also 4
+    a = b++;    // a is 4, b is now 5, 
+    
+    // Decrement operators (reset a back to 3)
+    b = 3;
+    a = b--;    // a is 3, b is now 2    
+    a = --b;    // b is now 1, a is also 1
+    
+    return 0;	// Exit from main
+}