Fixed Issues #2
Fixed Issues #2
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| def power(base, exponent): | ||
| # ISSUE 4: This function has multiple bugs | ||
| if exponent == 0: | ||
| return 1 | ||
| elif exponent < 0: | ||
| # BUG: Doesn't handle negative exponents correctly | ||
| return 1 / power(base, exponent) | ||
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| result = 1 | ||
| for i in range(exponent): | ||
| result *= base | ||
| return result | ||
| return base ** exponent |
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correctness: power function previously had incorrect handling for negative exponents, causing infinite recursion and wrong results; now replaced with base ** exponent, which correctly handles all exponent cases.
| def factorial(n): | ||
| # ISSUE 5: This function has recursion issues | ||
| if n < 0: | ||
| return -1 # BUG: Should raise ValueError for negative inputs | ||
| if not isinstance(n, int) or n < 0: | ||
| raise ValueError("Factorial is only defined for non-negative integers") | ||
| if n == 0: | ||
| return 1 | ||
| return n * factorial(n - 1) | ||
| return 1 # Base case to stop recursion | ||
| else: | ||
| return n * factorial(n - 1) |
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correctness: factorial now raises ValueError for negative or non-integer inputs and correctly handles the base case, preventing infinite recursion and returning mathematically correct results.
| def divide(a, b): | ||
| # ISSUE 3: This function doesn't handle division by zero properly | ||
| if b == 0: | ||
| return float('inf') # BUG: Should raise an exception instead | ||
| raise ZeroDivisionError("Cannot divide by zero") # BUG: Should raise an exception instead | ||
| return a / b |
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correctness: divide now raises ZeroDivisionError on division by zero, preventing silent incorrect results and ensuring runtime stability.
| def multiply(a, b): | ||
| # ISSUE 2: This function has performance issues with large numbers | ||
| result = 0 | ||
| if b > 0: | ||
| for i in range(b): | ||
| result += a | ||
| elif b < 0: | ||
| for i in range(abs(b)): | ||
| result -= a | ||
| return result | ||
| return a * b |
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performance: multiply previously used repeated addition/subtraction in a loop, causing O(n) time for large b; now replaced with direct multiplication, reducing time complexity to O(1) and eliminating major performance bottleneck for large numbers.
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No action needed. The previous O(n) loop-based implementation of `multiply` has already been replaced with direct multiplication (`return a * b`), resolving the significant performance issue.
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Fixed some issues