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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /js/src/tests/js1_1/regress/perfect.js | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'js/src/tests/js1_1/regress/perfect.js')
-rw-r--r-- | js/src/tests/js1_1/regress/perfect.js | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/js/src/tests/js1_1/regress/perfect.js b/js/src/tests/js1_1/regress/perfect.js new file mode 100644 index 000000000..ceb340d7a --- /dev/null +++ b/js/src/tests/js1_1/regress/perfect.js @@ -0,0 +1,47 @@ +/* + * Any copyright is dedicated to the Public Domain. + * http://creativecommons.org/licenses/publicdomain/ + */ + +// Some simple testing of new, eval and some string stuff. + +// constructor -- expression array initialization +function ExprArray(n,v) +{ + // Initializes n values to v coerced to a string. + for (var i = 0; i < n; i++) { + this[i] = "" + v; + } +} + + +// Print the perfect numbers up to n and the sum expression for n's divisors. +function perfect(n) +{ + print("The perfect numbers up to " + n + " are:"); + var results = []; + + // We build sumOfDivisors[i] to hold a string expression for + // the sum of the divisors of i, excluding i itself. + var sumOfDivisors = new ExprArray(n+1,1); + for (var divisor = 2; divisor <= n; divisor++) { + for (var j = divisor + divisor; j <= n; j += divisor) { + sumOfDivisors[j] += " + " + divisor; + } + // At this point everything up to 'divisor' has its sumOfDivisors + // expression calculated, so we can determine whether it's perfect + // already by evaluating. + if (eval(sumOfDivisors[divisor]) == divisor) { + print("" + divisor + " = " + sumOfDivisors[divisor]); + results.push(divisor); + } + } + print("That's all."); + return results; +} + + +print("\nA number is 'perfect' if it is equal to the sum of its") +print("divisors (excluding itself).\n"); + +reportCompare(perfect(500).join(), "6,28,496"); |