Problem 371. Decimal Comparison
Background
A utility of particular interest to Cody and other MATLAB ventures is comparing the equality of two numbers. In computing, numbers can be stored in a number of ways, but they all share the trait of being stored as a binary number. As such, the equals operator in MATLAB is checking the bits of one stored number against the bits of another stored number. In this problem, I ask that we move away from this binary representation and comparison of numbers back into the decimal domain.
Problem
Write a function that takes a character input that represents a number that we wish to compare against, n1, and a double input that represents the other number, n2. Output true if the numbers are equal to the precision of n1.
Example
n1 = '12.3456'
n2 = 12.3456
output = true
n1 = '12.34567432'
n2 = 12.3456
output = false
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4 Comments
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1 older comment
Andrew Dobrovolc
on 14 Aug 2017
the second test in the test suite is incorrect, it should be a negative assertion.
Siddhant Shenoy
on 26 Mar 2019
Yes, I completely agree with the other comments. The second test case is incorrect. '12.3456' is not equal to 12.3456789 which when rounded off to 4 decimal places becomes 12.3457
The 50 solvers yet (as of 26/03/19) are undeserving of their title as 'Solvers'.
Dyuman Joshi
on 24 Feb 2021
The test case has been corrected.
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