Go语言冒泡排序

package mainimport ("fmt")func main() {A := []int{5, 21, 2, 4, 1}num := len(A)for i := 0; i < num; i++ {for j := i + 1; j < num; j++ {if A[i] > A[j] {A[i], A[j] = A[j], A[i]}}}fmt.Println(A)}