1
func foo1(a string, b int) int {
2
  fmt.Println("=====foo1=====")
3
  fmt.Println("a = ", a, "\nb = ", b)
4
  c := 100
5
  return c
6
}
7

8
// 多个返回值（匿名）
9
func foo2(a string, b int) (int, int) {
10
  fmt.Println("=====foo2=====")
11
  fmt.Println("a = ", a, "\nb = ", b)
12
  return 222, 22222
13
}
14

15
// 多个返回值（有形参名称）
16
func foo3(a string, b int) (r1 int, r2 int) {
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  fmt.Println("=====foo3=====")
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  fmt.Println("a = ", a, "\nb = ", b)
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  r1 = 321
20
  r2 = 312
21
  return
22
}
23

24
// 多个返回值（有形参名称，类型相同可简写）
25
func foo4(a string, b int) (r1, r2 int) {
26
  fmt.Println("=====foo4=====")
27
  fmt.Println("a = ", a, "\nb = ", b)
28
  r1 = 411
29
  r2 = 412
30
  return
31
}
32

33
func main() {
34
  c := foo1("foo1", 111)
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  fmt.Println("main")
36
  fmt.Println("c = ", c)
37

38
  f2, f2222 := foo2("foo2", 222)
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  fmt.Println("f2 = ", f2)
40
  fmt.Println("f2222 = ", f2222)
41

42
  f3, f3333 := foo3("foo3", 333)
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  fmt.Println("f3 = ", f3)
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  fmt.Println("f3333 = ", f3333)
45

46
  f4, f4444 := foo4("foo4", 444)
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  fmt.Println("f4 = ", f4)
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  fmt.Println("f4444 = ", f4444)
49
}