Three word location: Difference between revisions
→{{header|Nim}}
Line 553:
latitude = -81.5638 longitude = 28.3852
</pre>
=={{header|Kotlin}}==
{{trans|Go}}
<lang scala>fun toWord(w: Long): String {
return "W%05d".format(w)
}
fun fromWord(ws: String): Long {
return ws.substring(1).toUInt().toLong()
}
fun main() {
println("Starting figures:")
var lat = 28.3852
var lon = -81.5638
println(" latitude = %.4f, longitude = %.4f".format(lat, lon))
println()
// convert lat and lon to positive integers
var ilat = (lat * 10000 + 900000).toLong()
var ilon = (lon * 10000 + 1800000).toLong()
// build 43 bit BigInt comprising 21 bits (lat) and 22 bits (lon)
var latlon = (ilat shl 22) + ilon
// isolate relevant bits
var w1 = (latlon shr 28) and 0x7fff
var w2 = (latlon shr 14) and 0x3fff
var w3 = latlon and 0x3fff
// convert to word format
val w1s = toWord(w1)
val w2s = toWord(w2)
val w3s = toWord(w3)
// and print the results
println("Three word location is:")
println(" $w1s $w2s $w3s")
println()
/* now reverse the procedure */
w1 = fromWord(w1s)
w2 = fromWord(w2s)
w3 = fromWord(w3s)
latlon = (w1 shl 28) or (w2 shl 14) or w3
ilat = latlon shr 22
ilon = latlon and 0x3fffff
lat = (ilat - 900000).toDouble() / 10000
lon = (ilon - 1800000).toDouble() / 10000
// and print the results
println("After reversing the procedure:")
println(" latitude = %.4f, longitude = %.4f".format(lat, lon))
}</lang>
{{out}}
<pre>Starting figures:
latitude = 28.3852, longitude = -81.5638
Three word location is:
W18497 W11324 W01322
After reversing the procedure:
latitude = 28.3852, longitude = -81.5638</pre>
=={{header|Nim}}==
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