On Sat, Apr 20, 2019 at 11:10 PM <lgod...@gmail.com> wrote:
>
> Here's the snippet I'm trying to run
>
> package main
> import ( "fmt" )
>
> func main() {
> Af(5)
> }
>
> func Af ( N int) {
>
> //var M = new([N][N]uint16) !compiler error
> //var M = make([N][N]uint16) !compiler error
The above two will not work. N needs to be a constant to declare an
array, here N is not a constant.
>
> //var M = make([][]uint16, N*N) ## run-time error
This is a slice of []uint16 with N*N elements. You never initialized
the elements of the array.
This should work:
https://play.golang.org/p/EABYHArTQ83
>
> // run-time error
> M := make( [][]uint16, N*N,N*N)
> for y:=0; y< N; y++ {
> for x :=0; x< N; x++ {
> M[y][x] = uint16(100*y +x)
> } }
>
> for y :=0; y< N; y++ {
> fmt.Printf("\n y= %3d", y )
> for x :=0; x< N; x++ {
> fmt.Printf(" %3d ", M[x][y] )
> } }
> fmt.Printf("\n>>>>>>>>>>" )
> }
>
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