Print large numbers with commas

Get the right stuff on stdout vs stderr

diff --git a/planeteer.go b/planeteer.go
index 53f69f1574c411b0d20b600b27459acfdacff1ee..9f0ede938e032a6d49e5deb8d32517d1f20512a1 100644 (file)
--- a/planeteer.go
+++ b/planeteer.go
@@ -430,7 +430,7 @@ func FillStateTable1(data planet_data, dims []int, table []State) {
                                <-barrier
                        }
                        work_done++
-                       fmt.Printf("\r%3.0f%%", 100*work_done/work_units)
+                       print(fmt.Sprintf("\r%3.0f%%", 100*work_done/work_units))
                }
        }
        print("\n")
@@ -456,9 +456,21 @@ func FindBestState(data planet_data, dims []int, table []State) int {
        return max_index
 }
 
+func Commas(n int) (s string) {
+       r := n % 1000
+       n /= 1000
+       for n > 0 {
+               s = fmt.Sprintf(",%03d", r) + s
+               r = n % 1000
+               n /= 1000
+       }
+       s = fmt.Sprint(r) + s
+       return
+}
+
 func DescribePath(data planet_data, dims []int, table []State, start int) (description []string) {
        for index := start; index > 0 && table[index].from > 0; index = table[index].from {
-               line := fmt.Sprintf("%10v", table[index].value)
+               line := fmt.Sprintf("%13v", Commas(table[index].value))
                addr := DecodeIndex(dims, index)
                prev := DecodeIndex(dims, table[index].from)
                if addr[Location] != prev[Location] {
@@ -526,6 +538,6 @@ func main() {
                best, DecodeIndex(dims, best), table[best].value)
        description := DescribePath(data, dims, table, best)
        for i := len(description) - 1; i >= 0; i-- {
-               print(description[i], "\n")
+               fmt.Println(description[i])
        }
 }