diff --git a/main.go b/main.go
index e093283..c8a6bae 100644
--- a/main.go
+++ b/main.go
@@ -1,12 +1,55 @@
 package main
 
-import "github.com/gin-gonic/gin"
+import (
+	"fmt"
+
+	"github.com/gin-gonic/gin"
+)
 
 func main() {
+	var i int
+	// sum := 0
+	var balance = [5]float32{1000.0, 2.0, 3.4, 7.0, 50.0}
+	for i = 0; i < 5; i++ {
+		fmt.Printf("balance[%d] = %f\n", i, balance[i])
+	}
+
+	a := []float32{1.2, 2.3, 34, 4.7}
+	nums := []int{2, 3, 4}
+	sum := 0
+	for _, num := range nums {
+		sum += num
+	}
+	fmt.Println("sum:", sum)
+	// fmt.Println("sum:", sum)
+
+	type stu struct {
+		name   string
+		id     int
+		gender string
+	}
+	var newstu = stu{"zhangsan", 2, "男"}
+	fmt.Println(newstu)
+	fmt.Println(newstu.gender)
+
+	var identifier []int
+	var slice1 []int = make([]int, 2)
+	println(identifier)
+	println(slice1)
+
+	var countryMap map[string]string
+	countryMap = make(map[string]string)
+	countryMap["china"] = "北京"
+	for capital := range countryMap {
+		fmt.Println(capital, countryMap[capital])
+	}
+
 	r := gin.Default()
 	r.GET("xie", func(c *gin.Context) {
 		c.JSON(200, gin.H{
-			"data": "zbck",
+			"data":    "zbck",
+			"balance": balance,
+			"a":       a,
 		})
 	})
 	r.Run()