diff --git a/README.md b/README.md
index e2c1c74..b37fa84 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,26 @@
-# eSLBHR
+#include <stdio.h>
+#include <math.h>
+int main() {
+ int n;
+ printf("请输入一个1-100之间的整数：\n");
+ scanf("%d", &n);
+ 
+ 
+ int i = 0;
+ int q = sqrt(n);
+ for (i = 2; i <= q; i++ ) {
+  if(n % i  == 0) {
+   break;
+  }
+ }
+ if (i > q) {
+  printf("%d是素数\n", n);
+ } else {
+  printf("%d不是素数\n", n);
+ }
+ 
+ return 0;
+}
+
+