55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
package main
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import "fmt"
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func main() {
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slice1 := []int{1, 2, 3}
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fmt.Printf("len = %d, slice = %v\n", len(slice1), slice1)
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var slice2 []int
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fmt.Printf("len = %d, slice = %v\n", len(slice2), slice2)
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var slice3 []int
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slice3 = make([]int, 3)
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slice3[0] = 100
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fmt.Printf("len = %d, slice = %v\n", len(slice3), slice3)
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var slice4 []int = make([]int, 3)
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fmt.Printf("len = %d, slice = %v\n", len(slice4), slice4)
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slice5 := make([]int, 3)
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fmt.Printf("len = %d, slice = %v\n", len(slice5), slice5)
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var slice6 []int
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if slice6 == nil {
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fmt.Println("slice6为空")
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} else {
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fmt.Println("slice长度为", len(slice6))
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}
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// 长度与容量
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var numbers = make([]int, 3, 5)
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fmt.Printf("len = %d, cap = %d, slice = %v\n", len(numbers), cap(numbers), numbers)
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// 追加一个元素1（len(numbers) = 4）
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numbers = append(numbers, 1)
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fmt.Printf("len = %d, cap = %d, slice = %v\n", len(numbers), cap(numbers), numbers)
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numbers = append(numbers, 2)
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fmt.Printf("len = %d, cap = %d, slice = %v\n", len(numbers), cap(numbers), numbers)
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numbers = append(numbers, 3)
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fmt.Printf("len = %d, cap = %d, slice = %v\n", len(numbers), cap(numbers), numbers)
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var numbers2 = make([]int, 3)
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fmt.Printf("len = %d, cap = %d, slice = %v\n", len(numbers2), cap(numbers2), numbers2)
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// 截取
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s := []int{1, 2, 3}
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s1 := s[0:2]
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s2 := make([]int, 3)
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copy(s2, s)
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s[1] = 200
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fmt.Println(s1)
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fmt.Println(s)
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fmt.Println(s2)
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}
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