package main import "fmt" func main() { /* fmt.Println(111) fmt.Println("Hello World") fmt.Print("Hello" + "JaxMu") var stockcode = 123 var enddate = "2025-12-31" var url = "Code=%d&endDate=%s" var target_url = fmt.Sprintf(url, stockcode, enddate) fmt.Println(target_url) var y uint8 = 222 fmt.Print(y) const ( a = iota //0 b //1 c //2 d = "ha" //独立值,iota += 1 e //"ha" iota += 1 f = 100 //iota +=1 g //100 iota +=1 h = iota //7,恢复计数 i //8 ) fmt.Println(a, b, c, d, e, f, g, h, i)*/ const ( i = 1 << iota j = 3 << iota k // 3<<2 l // 3<<3 x // 3<<4 ) fmt.Println("i=", i) fmt.Println("j=", j) }