A line filter is a common type of program that reads input on stdin, processes it, and then prints some derived result to stdout. grep and sed are common line filters
package main import ( "bufio" "fmt" "os" "strings" ) func main() { scanner := bufio.NewScanner(os.Stdin) for scanner.Scan() { ucl := strings.ToUpper(scanner.Text()) fmt.Println(ucl) } if err := scanner.Err(); err != nil { fmt.Fprintln(os.Stderr, "error:", err) os.Exit(1) } }
jsjsksksjk JSJSKSKSJK hshfhfj HSHFHFJ ^Cexit status 2
总结 ：
1 ： ......
