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40 lines
1015 B
JavaScript
40 lines
1015 B
JavaScript
function Euclid_gcd(a, b) {
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a = +a;
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b = +b;
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if (a !== a || b !== b) {
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return [NaN, NaN, NaN];
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}
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if (a === Infinity || a === -Infinity || b === Infinity || b === -Infinity) {
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return [Infinity, Infinity, Infinity];
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}
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// Checks if a or b are decimals
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if ((a % 1 !== 0) || (b % 1 !== 0)) {
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return false;
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}
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var signX = (a < 0) ? -1 : 1,
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signY = (b < 0) ? -1 : 1,
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x = 0,
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y = 1,
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u = 1,
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v = 0,
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q, r, m, n;
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a = Math.abs(a);
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b = Math.abs(b);
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while (a !== 0) {
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q = Math.floor(b / a);
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r = b % a;
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m = x - u * q;
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n = y - v * q;
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b = a;
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a = r;
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x = u;
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y = v;
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u = m;
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v = n;
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}
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return [b, signX * x, signY * y];
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}
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console.log(Euclid_gcd(17, 4));
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