Created
September 5, 2020 13:44
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Fibonacci number
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| fibStore = {} | |
| def fibWrapper(num, mode): | |
| # num : number to compute | |
| # mode : 'r' for return or 'p' for print | |
| if not (mode == 'r' or mode == 'p'): | |
| raise ValueError("mode must be 'r' or 'p'") | |
| value = fib(num) | |
| if mode=='r': | |
| return value | |
| if mode == 'p': | |
| print(value) | |
| def fib(n): | |
| # computes the nth fibonacci number, recursively | |
| if n in fibStore: | |
| return fibStore[n] | |
| if n == 0: | |
| fibStore[n] = 0 | |
| return 0 | |
| if n == 1 or n==2: | |
| fibStore[n] = 1 | |
| return 1 | |
| value = fib(n-1) + fib(n-2) | |
| fibStore[n] = value | |
| return value | |
| def square(x): | |
| return x**2 | |
| def main(): | |
| num = input("Enter a number: ") | |
| num = int(num) | |
| mode = input("Enter mode: ") | |
| if mode == 'p': | |
| fibWrapper(num, mode) | |
| else: | |
| output = fibWrapper(num, mode) | |
| print("output for main: ", output) | |
| if __name__ == '__main__': | |
| try: | |
| main() | |
| except ValueError as e: | |
| print(e) | |
| print("Try again:") | |
| main() |
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