如何使用Go编程语言为数组分配内存？

Question

I want to make an array of size N in go, but I don't know what N will be at compile time, how would I allocate memory for it?

e.g.

func MakeArray(size int) {
  return new ([size]int)
}

which doesn't work since size is not a constant.

This seems like a simple question, but I just started using go and it's not obvious to me how to do this from reading the tutorial (or searching the documentation for that matter).

Answer 1

The function make creates slices, maps, and channels, and it returns an initialized value of type T. The make() call allocates a new, hidden array to which the returned slice value refers.

package main

import "fmt"

func main(){

   ptr := new(int)
   *ptr = 100

   fmt.Println("*ptr = ", *ptr)

   slice := make([]int, 10)    // slice with len(slice) == cap(slice) == 10

   for i:=0; i<len(slice); i++{
      fmt.Println(slice[i])
   }
}