package main
import (
"fmt"
"runtime"
"sync"
)
func main() {
// Allocate 1 logical processor for the scheduler to use.
runtime.GOMAXPROCS(1)
// wg is used to wait for the program to finish.
// Add a count of two, one for each goroutine.
var wg sync.WaitGroup
wg.Add(2)
fmt.Println("Start Goroutines")
// Declare an anonymous function and create a goroutine.
go func() {
// Schedule the call to Done to tell main we are done.
defer wg.Done()
// Display the alphabet three times
for count := 0; count < 3; count++ {
for char := 'a'; char < 'a'+26; char++ {
fmt.Printf("%c ", char)
}
}
}()
// Declare an anonymous function and create a goroutine.
go func() {
// Schedule the call to Done to tell main we are done.
defer wg.Done()
// Display the alphabet three times
for count := 0; count < 3; count++ {
for char := 'A'; char < 'A'+26; char++ {
fmt.Printf("%c ", char)
}
}
}()
// Wait for the goroutines to finish.
fmt.Println("Waiting To Finish")
wg.Wait()
fmt.Println("\nTerminating Program")
}
Start Goroutines
Waiting To Finish
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A B C D E F G H I J K L M N OP Q R S T U V W X Y Z a b c d e f g h i j k l m n o p q r s t u v w x y z a b c d e f g h i j k l m n o p q r s t u v w x y z a b c de f g h i j k l m n o p q r s t u v w x y z
Terminating Program
请教，为什么总是大写字母先打印？我觉得应该小写字母先打印啊。
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