Question 229146 in Javascript Question posted in
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how to solve uri 1015 question of Distance between two points with javaScript?

This is the problem

and below is the JavaScript code I wrote. But it’s still says 85% wrong, although the output comes correct

let x1 = 1.0;
let y1 = 7.0;
let x2 = 5.0;
let y2 = 9.0;

function Distance(a, b, c, d) {
  let z = Math.sqrt(Math.pow(a - b, 2) + Math.pow(c - d, 2));
  console.log(z.toFixed(4));
}

Distance(x2, x1, y2, y1);
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2

Answers


  1. 0

    The problem you’re encountering might be related to the precision of the floating-point arithmetic in JavaScript. Floating-point numbers can sometimes have small rounding errors that could lead to slight discrepancies when compared to the expected output. To improve the accuracy of your solution, you can use the Number.EPSILON constant to compare the calculated distance with the expected result.

    Here’s the modified code with the suggested improvement:

    let x1 = 1.0;
let y1 = 7.0;
let x2 = 5.0;
let y2 = 9.0;

function Distance(a, b, c, d) {
    let z = Math.sqrt(Math.pow(a - b, 2) + Math.pow(c - d, 2));
    return z;
}

let calculatedDistance = Distance(x2, x1, y2, y1);
let expectedDistance = 5.0; // Modify this to match the expected result

if (Math.abs(calculatedDistance - expectedDistance) < Number.EPSILON) {
    console.log("Distance calculation is correct!");
} else {
    console.log("Distance calculation is incorrect.");
    console.log("Calculated Distance:", calculatedDistance.toFixed(4));
    console.log("Expected Distance:", expectedDistance);
}

    In this code, we calculate the distance using the Distance function and then compare the calculated distance with the expected result using the Math.abs function and the Number.EPSILON constant. This approach takes into account potential small rounding errors and provides a more accurate way to check the correctness of your solution.

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  2. 0

    You are missing the file read or at least the line parsing

    let file = `1.0 7.0
5.0 9.0`;

function Distance(a, b, c, d) {
  let z = Math.sqrt(Math.pow(a - b, 2) + Math.pow(c - d, 2));
  console.log(z.toFixed(4));
}

const [_, x1, y1, x2, y2] = file.match(/(d+.d+)s+(d+.d+)s+(d+.d+)s+(d+.d+)/);

Distance(x2, x1, y2, y1);
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