Three word location: Difference between revisions
Added Go
(Added Wren) |
(Added Go) |
||
Line 20:
=={{header|Go}}==
{{trans|Wren}}
Though no need for big integers as we have int64 built in.
<lang go>package main
import (
"fmt"
"strconv"
)
func toWord(w int64) string { return fmt.Sprintf("W%05d", w) }
func fromWord(ws string) int64 {
var u, _ = strconv.ParseUint(ws[1:], 10, 64)
return int64(u)
}
func main() {
fmt.Println("Starting figures:")
lat := 28.3852
lon := -81.5638
fmt.Printf(" latitude = %0.4f, longitude = %0.4f\n", lat, lon)
// convert lat and lon to positive integers
ilat := int64(lat*10000 + 900000)
ilon := int64(lon*10000 + 1800000)
// build 43 bit BigInt comprising 21 bits (lat) and 22 bits (lon)
latlon := (ilat << 22) + ilon
// isolate relevant bits
w1 := (latlon >> 28) & 0xefff
w2 := (latlon >> 14) & 0x7fff
w3 := latlon & 0x7fff
// convert to word format
w1s := toWord(w1)
w2s := toWord(w2)
w3s := toWord(w3)
// and print the results
fmt.Println("\nThree word location is:")
fmt.Printf(" %s %s %s\n", w1s, w2s, w3s)
/* now reverse the procedure */
w1 = fromWord(w1s)
w2 = fromWord(w2s)
w3 = fromWord(w3s)
latlon = (w1 << 28) | (w2 << 14) | w3
ilat = latlon >> 22
ilon = latlon & 0xfffff
lat = float64(ilat-900000) / 10000
lon = float64(ilon-1800000) / 10000
// and print the results
fmt.Println("\nAfter reversing the procedure:")
fmt.Printf(" latitude = %0.4f, longitude = %0.4f\n", lat, lon)
}</lang>
{{out}}
<pre>
Starting figures:
latitude = 28.3852, longitude = -81.5638
Three word location is:
W18497 W27708 W01322
After reversing the procedure:
latitude = 28.3852, longitude = -81.5638
</pre>
=={{header|Julia}}==
| |||