Enter a positive number or enter/return to quit: 2 The program's estimate is 1.4142135623746899 Python's estimate is 1.4142135623730951 Enter a positive number or enter/return to quit
Enter a positive number or enter/return to quit: 2 The program's estimate is 1.4142135623746899 Python's estimate is 1.4142135623730951 Enter a positive number or enter/return to quit
C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN:9781337102087
Author:D. S. Malik
Publisher:D. S. Malik
Chapter15: Recursion
Section: Chapter Questions
Problem 15SA
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What should be the correct code below with the same problem?
import math
# Initialize the tolerance
TOLERANCE = 0.000001
def newton(x):
"""Returns the square root of x."""
# Perform the successive approximations
estimate = 1.0
while True:
estimate = (estimate + x / estimate) / 2
difference = abs(x - estimate ** 2)
if difference <= TOLERANCE:
break
return estimate
def main():
"""Allows the user to obtain square roots."""
while True:
# Receive the input number from the user
x = input("Enter a positive number or enter/return to quit: ")
if x == "":
break
x = float(x)
# Output the result
print("The program's estimate is", newton(x))
print("Python's estimate is ", math.sqrt(x))
if __name__ == "__main__":
main()
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