// code_002_basedata project main.go package main import ( "fmt" ) type Power struct { age int high int name string } func main() { var str string str = "abc" ch := str[0] fmt.Printf("str= %s, len= %d \n", str, len(str)) fmt.Printf("str[0]= %c, ch = %c\n", str[0], ch) str2 := `hello mike \n \r测试 ` fmt.Println("str2=", str2) var v1 complex64 v1 = 3.2 + 12i v2 := 3.2 + 12i v3 := complex(3.2, 12) fmt.Println(v1, v2, v3) fmt.Println(real(v1), imag(v1)) fmt.Println("============") var i Power = Power{18, 178, "tom"} fmt.Printf("type:%T\n", i) fmt.Printf("value:%v\n", i) fmt.Printf("value:%+v\n", i) fmt.Printf("value:%#v\n", i) /* ============ type:main.Power value:{18 178 tom} value:{age:18 high:178 name:tom} value:main.Power{age:18, high:178, name:"tom"} */ fmt.Println("=====intervface=======") var interstr interface{} = i fmt.Printf("%v\n", interstr) fmt.Println(interstr) /* =====intervface======= {18 178 tom} {18 178 tom} */ } //常用的格式化字符:%s, %d, %c, %T, %v, %p
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How to Build a Billion Dollar App
George Berkowski / Little, Brown Book Group / 2015-4-1 / USD 24.95
Apps have changed the way we communicate, shop, play, interact and travel and their phenomenal popularity has presented possibly the biggest business opportunity in history. In How to Build a Billi......一起来看看 《How to Build a Billion Dollar App》 这本书的介绍吧!