Un cours pour se lancer dans la programmation avec le langage Go (golang).
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1 年之前
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  1. package main
  2. import "fmt"
  3. func main() {
  4. i := 10
  5. fmt.Println(&i)
  6. n := &i
  7. fmt.Printf("%T\n", n)
  8. fmt.Println(n)
  9. fmt.Println(i)
  10. *n = 15
  11. fmt.Println(i)
  12. j := 5
  13. n = &j
  14. *n = 6
  15. fmt.Println(i)
  16. a := 5
  17. fmt.Println(a) // value is 5
  18. pointer(&a)
  19. fmt.Println(a) // value is 10
  20. a = 5
  21. fmt.Println(a) // value is 5
  22. value(a)
  23. fmt.Println(a) // value is still 5
  24. ar := []int{1, 2, 3, 4}
  25. fmt.Println(ar)
  26. arrval(ar)
  27. fmt.Println(ar)
  28. arrpointer(&ar)
  29. fmt.Println(ar)
  30. m := make(map[int]int)
  31. m[1] = 1
  32. m[2] = 2
  33. m[3] = 3
  34. fmt.Println(m)
  35. mapped(m)
  36. fmt.Println(m)
  37. m2 := map[int]int{1: 1}
  38. mapped(m2)
  39. fmt.Println(m2)
  40. }
  41. func pointer(x *int) {
  42. *x = 10
  43. }
  44. func value(x int) {
  45. x = 10
  46. }
  47. func arrval(a []int) {
  48. a = append(a, 5)
  49. }
  50. func arrpointer(a *[]int) {
  51. *a = append(*a, 5)
  52. }
  53. func mapped(m map[int]int) {
  54. m[4] = 4
  55. }