Go 参数

package main



import "fmt"



/* global variable declaration */

var a int = 20;



func main() {

   /* local variable declaration in main function */

   var a int = 10

   var b int = 20

   var c int = 0



   fmt.Printf("value of a in main() = %d\n",  a);

   c = sum( a, b);

   fmt.Printf("value of c in main() = %d\n",  c);

}

/* function to add two integers */

func sum(a, b int) int {

   fmt.Printf("value of a in sum() = %d\n",  a);

   fmt.Printf("value of b in sum() = %d\n",  b);



   return a + b;

}