1 package main
 2 
 3 import "fmt"
 4 
 5 func main() {
 6     a := [5]int{1, -2, 2, -4, 5}
 7 
 8     for i := 0; i < len(a)-1; i++ {
 9         for j := 0; j < len(a)-1-i; j++ {
10             if a[j] < a[j+1] {
11                 a[j+1], a[j] = a[j], a[j+1]
12             }
13         }
14     }
15     fmt.Println("a=", a)
16 }