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读取用户的输入
我们如何读取用户的键盘(控制台)输入呢?从键盘和标准输入(os.Stdin)读取输入,最简单的办法是使用 fmt
包提供的 Scan 和 Sscan 开头的函数。请看以下程序:
Listing 12.1—readinput1.go:
// read input from the console:
package main
import "fmt"
var (
firstName, lastName, s string
i int
f float32
input = "56.12 / 5212 / Go"
format = "%f / %d / %s"
)
func main() {
fmt.Println("Please enter your full name: ")
fmt.Scanln(&firstName, &lastName)
// fmt.Scanf("%s %s", &firstName, &lastName)
fmt.Printf("Hi %s %s!\n", firstName, lastName) // Hi Chris Naegels
fmt.Sscanf(input, format, &f, &i, &s)
fmt.Println("From the string we read: ", f, i, s)
// output: From the string we read: 56.12 5212 Go
}