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19 lines
484 B
Markdown
19 lines
484 B
Markdown
2 years ago
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# Square Root
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TODO
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The following is an [approximation](approximation.md) of integer square root in [C](c.md) that has acceptable accuracy to about 1 million (maximum error from 1000 to 1000000 is about 7%): { Painstakingly made by me. ~drummyfish }
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```
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int32_t sqrtApprox(int32_t x)
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{
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return
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(x < 1024) ?
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(-2400 / (x + 120) + x / 64 + 20) :
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((x < 93580) ?
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(-1000000 / (x + 8000) + x / 512 + 142) :
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(-75000000 / (x + 160000) + x / 2048 + 565));
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}
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```
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