White[354]% g++ scope1.cpp

White[355]% ./a.out
In afunc(), a = 2

In a block in afunc(), a = 3
In a block in afunc(), ::a = 1

In a for loop in afunc(), a = 7
In a for loop in afunc(), a = 8
In a for loop in afunc(), a = 9

After for loop in afunc(), a = 2
White[356]%