diff --git "a/homework/\347\254\254\344\272\214\345\221\250/GO-7\346\234\237-7098-\344\277\236\346\266\233\346\257\205/main.go" "b/homework/\347\254\254\344\272\214\345\221\250/GO-7\346\234\237-7098-\344\277\236\346\266\233\346\257\205/main.go"
new file mode 100644
index 0000000000000000000000000000000000000000..2590139ca1ec527b222390d4b2beeecee2609591
--- /dev/null
+++ "b/homework/\347\254\254\344\272\214\345\221\250/GO-7\346\234\237-7098-\344\277\236\346\266\233\346\257\205/main.go"
@@ -0,0 +1,49 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"strconv"
+	"strings"
+	"time"
+	// "math/rand"
+)
+
+func get_int() {
+	cur_int := make([]int, 0, 10)
+	rand.Seed(time.Now().UnixNano())
+	for i := 0; i < 100; i++ {
+
+		cur_int = append(cur_int, rand.Intn(128))
+
+	}
+	count_int := make(map[int]int)
+	for _, value := range cur_int {
+		count_int[value] = count_int[value] + 1
+	}
+
+	fmt.Printf("随机100个元素中，共有%d不同的元素", len(count_int))
+}
+
+func arr2string(arr []int) string {
+	toStr := strings.Builder{}
+	var b string
+	for _, value := range arr {
+		a := strconv.Itoa(value)
+		b := strings.Join([]string{a, b}, "  ")
+		toStr.WriteString(b)
+	}
+	return strings.TrimSuffix(toStr.String(), " ")
+
+}
+
+func main() {
+
+	//统计100个元素中有多少个互不相同元素
+	get_int()
+
+	//2. 实现一个函数func arr2string(arr []int) string，比如输入[]int{2,4,6}，返回“2 4 6”。输入的切片可能很短，也可能很长。
+	arr := []int{2, 3, 20, 103, 10}
+	fmt.Printf("%v", arr2string(arr))
+
+}