diff --git a/day05/file/file.exe b/day05/file/file.exe
new file mode 100644
index 0000000..bb467fb
Binary files /dev/null and b/day05/file/file.exe differ
diff --git a/day05/file/main.go b/day05/file/main.go
new file mode 100644
index 0000000..9a21d97
--- /dev/null
+++ b/day05/file/main.go
@@ -0,0 +1,81 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+)
+
+// 通过ioutil去读取
+func readFromFileByIoutil() {
+	ret, err := ioutil.ReadFile("./main.go")
+	if err != nil {
+		fmt.Printf("read file error,err:%v\n", err)
+		return
+	}
+	fmt.Println(string(ret))
+}
+
+// 通过ioutil去读取
+func readFromFileByIoutil() {
+	file, err := ioutil.ReadFile("./main.go")
+	if err != nil {
+		fmt.Printf("read file error: err%v\n", err)
+		return
+	}
+	fmt.Println(file)
+}
+
+// 使用bufio去读取文件
+func readFromFilebyBufio() {
+	fileObj, err := os.Open("./main.go")
+	if err != nil {
+		fmt.Printf("Open file failed,err:%v", err)
+	}
+	defer fileObj.Close()
+	//上述记得关闭文件
+	reader := bufio.NewReader(fileObj)
+	//创建一个用来从文件中读内容的对象
+	for {
+		line, err := reader.ReadString('\n')
+		if err == io.EOF {
+			return
+		}
+		if err != nil {
+			fmt.Printf("read line failed,err:%v", err)
+			return
+		}
+		fmt.Print(line)
+	}
+}
+
+func main() {
+	// fileObj, err := os.Open("./main.go")
+	// if err != nil {
+	// 	fmt.Printf("open file failed,err:%v", err)
+	// 	return
+	// }
+	// defer fileObj.Close()
+	// var tmp [128]byte
+	// //读文件
+	// for {
+	// 	n, err := fileObj.Read(tmp[:])
+	// 	if err == io.EOF {
+	// 		fmt.Println("读完了")
+	// 		return
+	// 	}
+	// 	if err != nil {
+	// 		fmt.Printf("read failed!:%v", err)
+	// 		return
+	// 	}
+	// 	fmt.Printf("读了%d个字节", n)
+	// 	fmt.Println(string(tmp[:n]))
+	// 	if n < 128 {
+	// 		return
+	// 	}
+	// }
+	// readFromFilebyBufio()
+	readFromFileByIoutil()
+}
diff --git a/day05/fileopen/main.go b/day05/fileopen/main.go
new file mode 100644
index 0000000..e69de29
diff --git a/day05/filewrite/filewrite.exe b/day05/filewrite/filewrite.exe
new file mode 100644
index 0000000..ddcd80b
Binary files /dev/null and b/day05/filewrite/filewrite.exe differ
diff --git a/day05/filewrite/main.go b/day05/filewrite/main.go
new file mode 100644
index 0000000..ea3ef3b
--- /dev/null
+++ b/day05/filewrite/main.go
@@ -0,0 +1,57 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io/ioutil"
+	"os"
+)
+
+//打开文件
+
+// func filewrite() {
+
+// }
+
+func main() {
+	// file, err := os.OpenFile("./xx.txt", os.O_APPEND|os.O_CREATE, 0644)
+	// if err != nil {
+	// 	fmt.Printf("open file failed,err :%v", err)
+	// 	return
+	// }
+	// // fmt.Println(file)
+	// //write
+	// file.Write([]byte("吱吱吱!"))
+	// file.WriteString("萨瓦迪卡！")
+	// file.Close()
+	readfile()
+	iouitlfile()
+}
+
+func readfile() {
+	file, err := os.OpenFile("./xx.txt", os.O_WRONLY|os.O_TRUNC, 0666)
+	if err != nil {
+		fmt.Printf("open file failed,err :%v", err)
+		return
+	}
+	defer file.Close()
+	writer := bufio.NewWriter(file)
+	for i := 0; i < 1; i++ {
+		writer.WriteString("hello")
+	}
+	writer.Flush() //将缓存的数据写入文件
+}
+
+func iouitlfile() {
+	str := "hello 沙河"
+	err := ioutil.WriteFile("./xx.txt", []byte(str), 0666)
+	//这部分会清空原文件内容，然后再写入数据
+	if err != nil {
+		fmt.Printf("open file failed,err :%v", err)
+		return
+	}
+}
+
+//上述通过writestring去实现
+//另外或者可以通过bufio.newWriter去实现
+//再者，可以通过ioutil.Writefile
diff --git a/day05/filewrite/xx.txt b/day05/filewrite/xx.txt
new file mode 100644
index 0000000..8fa467a
--- /dev/null
+++ b/day05/filewrite/xx.txt
@@ -0,0 +1 @@
+hello 沙河
\ No newline at end of file
diff --git a/day05/get_input/main.go b/day05/get_input/main.go
new file mode 100644
index 0000000..69cec8b
--- /dev/null
+++ b/day05/get_input/main.go
@@ -0,0 +1,27 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+func useScan() {
+	var s string
+	fmt.Print("input ur message")
+	fmt.Scanln(&s)
+	fmt.Printf("你输入的是%s\n", s)
+
+}
+
+func useBufio() {
+	var s string
+	reader := bufio.NewReader(os.Stdin)
+	s, _ = reader.ReadString('\n')
+	//直到读到了\n换行符为止
+	fmt.Printf("您输入的是%s", s)
+}
+
+func main() {
+
+}
diff --git a/day05/package/main.go b/day05/package/main.go
new file mode 100644
index 0000000..0cd1982
--- /dev/null
+++ b/day05/package/main.go
@@ -0,0 +1,15 @@
+package main
+
+import "fmt"
+
+var x int8 = 10
+
+const pi = 3.14
+
+func init() {
+	fmt.Println(pi)
+}
+
+func main() {
+	fmt.Println(x)
+}
diff --git a/day05/package/package.exe b/day05/package/package.exe
new file mode 100644
index 0000000..1c99eb4
Binary files /dev/null and b/day05/package/package.exe differ