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25 lines
376 B
25 lines
376 B
--TEST--
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π
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--FILE--
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<?php
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function main()
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{
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ini_set("precision", 17);
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$rounds = 1_0000_0000;
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$stop = $rounds + 2;
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$begin = microtime(true);
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$x = 1.0;
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$pi = 1.0;
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for ($i = 2; $i <= $stop; $i++) {
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$x = -1.0 + 2.0 * ($i & 0x1);
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$pi += $x / (2 * $i - 1);
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}
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$pi *= 4.0;
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print $pi . "\n";
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}
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?>
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--EXPECT--
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3.141592643589326
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