csr_monkey的博客

1.读文件const filename = "./learn/abc.txt"if value, err := ioutil.ReadFile(filename); err != nil { fmt.Println(err)} else { fmt.Printf("%s\n", value)}2.switchfunc grade(score int) string {...

数字转字符串strconv.Itoa(n%2)一行行读文件func printFile () { file, err := os.Open("./learn/abc.txt") if err!=nil { panic(err) } scanner := bufio.NewScanner(file) for scanner.Scan() { fmt.Println(sca...

指针func swap(a, b *int) { *a, *b = *b, *a}函数只有值传递，没有引用交换值func main() { a, b := 3, 4 a, b = swap(a, b) fmt.Println(a, b)}func swap(a, b int) (int,int){ return b,a}数组定义func main() { va...

切片的append操作 arr := [...]int{0, 1, 2, 3, 4, 5, 6} s1 := arr[2:5] s3 := append(s1, 10) s4 := append(s3, 20) // 超过arr的cap 系统会重新分配更大数组 // s5 no longer view arr s5 := append(s4, 30) fmt.Println("s3...

结构体创建type treeNode struct { value int left, right *treeNode}func main() { var tree treeNode fmt.Println(tree) tree = treeNode{5, nil, nil} tree.left = &treeNode{} tree.right = &...