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There is also no danger that the values taken on by the parameter
n will get in one another's way. Each time
recursive_power_of_2 is entered, C sets aside a
private storage spot to hold the value of n for that
entry:
Each function call has an
independent value for n
First call to recursive_power_of_2 ----* | | | |
| | <---* | | |
*--------------------------------------* | | |
| | |
Second call to recursive_power_of_2 ---* | | |
| | <-----* | |
*--------------------------------------* | |
| |
... <-------* |
|
Final call to recursive_power_of_2 ----* |
| | <---------*
*--------------------------------------*