68 lines
1.8 KiB
Go
68 lines
1.8 KiB
Go
package main
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import "fmt"
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// function required by task
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func degrees2compasspoint(h float32) string {
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return compassPoint[cpx(h)]
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}
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// cpx returns integer index from 0 to 31 corresponding to compass point.
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// input heading h is in degrees. Note this index is a zero-based index
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// suitable for indexing into the table of printable compass points,
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// and is not the same as the index specified to be printed in the output.
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func cpx(h float32) int {
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x := int(h/11.25+.5) % 32
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if x < 0 {
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x += 32
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}
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return x
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}
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// printable compass points
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var compassPoint = []string{
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"North",
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"North by east",
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"North-northeast",
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"Northeast by north",
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"Northeast",
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"Northeast by east",
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"East-northeast",
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"East by north",
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"East",
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"East by south",
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"East-southeast",
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"Southeast by east",
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"Southeast",
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"Southeast by south",
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"South-southeast",
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"South by east",
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"South",
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"South by west",
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"South-southwest",
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"Southwest by south",
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"Southwest",
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"Southwest by west",
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"West-southwest",
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"West by south",
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"West",
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"West by north",
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"West-northwest",
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"Northwest by west",
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"Northwest",
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"Northwest by north",
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"North-northwest",
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"North by west",
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}
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func main() {
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fmt.Println("Index Compass point Degree")
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for i, h := range []float32{0.0, 16.87, 16.88, 33.75, 50.62, 50.63, 67.5,
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84.37, 84.38, 101.25, 118.12, 118.13, 135.0, 151.87, 151.88, 168.75,
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185.62, 185.63, 202.5, 219.37, 219.38, 236.25, 253.12, 253.13, 270.0,
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286.87, 286.88, 303.75, 320.62, 320.63, 337.5, 354.37, 354.38} {
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index := i%32 + 1 // printable index computed per pseudocode
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fmt.Printf("%4d %-19s %7.2f°\n", index, degrees2compasspoint(h), h)
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}
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}
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