package main

import "fmt"

func foo1(a string, b int) int {
	fmt.Println("a = ", a)
	fmt.Println("b = ", b)

	c := 100

	return c
}

func foo2(a string, b int) (int, int) {
	fmt.Println("a = ", a)
	fmt.Println("b = ", b)

	return 666, 777
}

func foo3(a string, b int) (r1 int, r2 int) {
	fmt.Println("---- foo3 ----")
	fmt.Println("a = ", a)
	fmt.Println("b = ", b)

	fmt.Println("r1 = ", r1)
	fmt.Println("r2 = ", r2)

	// 给有名称的返回值变量赋值
	r1 = 1000
	r2 = 2000

	return
}

func foo4(a string, b int) (r1, r2 int) {
	fmt.Println("---- foo4 ----")
	fmt.Println("a = ", a)
	fmt.Println("b = ", b)

	// 给有名称的返回值变量赋值
	r1 = 1000
	r2 = 2000

	return
}

func main() {
	c := foo1("abc", 555)
	fmt.Println("c = ", c)

	ret1, ret2 := foo2("haha", 999)
	fmt.Println("ret1 = ", ret1, ", ret2 = ", ret2)

	re1, re2 := foo3("foo3", 333)
	fmt.Println("re1 = ", re1, ", re2 = ", re2)

	res1, res2 := foo4("foo4", 333)
	fmt.Println("res1 = ", res1, ", res2 = ", res2)
}