Go 变量作用域

package main



import "fmt"



/* global variable declaration */

var g int



func main() {

   /* local variable declaration */

   var a, b int



   /* actual initialization */

   a = 10

   b = 20

   g = a + b



   fmt.Printf("value of a = %d, b = %d and g = %d\n", a, b, g)

}