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  • golang 4. 函数 func

    package main
    
    import "fmt"
    
    func foo1(a string, b int) int {
    	fmt.Println("a = ", a)
    	fmt.Println("b = ", b)
    
    	c := 100
    
    	return c
    }
    
    //返回多个返回值,匿名的
    func foo2(a string, b int) (int, int) {
    	fmt.Println("a = ", a)
    	fmt.Println("b = ", b)
    
    	return 666, 777
    }
    
    //返回多个返回值, 有形参名称的
    func foo3(a string, b int) (r1 int, r2 int) {
    	fmt.Println("---- foo3 ----")
    	fmt.Println("a = ", a)
    	fmt.Println("b = ", b)
    
    
    
    	//r1 r2 属于foo3的形参,  初始化默认的值是0
    	//r1 r2 作用域空间 是foo3 整个函数体的{}空间
    	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)
    
    	ret1, ret2 = foo3("foo3", 333)
    	fmt.Println("ret1 = ", ret1, " ret2 = ", ret2)
    
    	ret1, ret2 = foo4("foo4", 444)
    	fmt.Println("ret1 = ", ret1, " ret2 = ", ret2)
    }
    
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  • 原文地址:https://www.cnblogs.com/dech/p/14941373.html
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