diff --git a/判断数字类型 b/判断数字类型
new file mode 100644
index 0000000..050add0
--- /dev/null
+++ b/判断数字类型
@@ -0,0 +1,23 @@
+#include<stdio.h>
+#include<math.h>
+int fun(int a)
+{
+    int ans = 0;
+    for(int i = 2; i <= sqrt(a); i++)
+    {
+        if(a%i==0)
+        {
+            ans = 1;
+            break;
+        }
+    }
+    return ans;
+}
+int main()
+{
+    int a;
+    scanf("%d",&a);
+    int ans = fun(a);
+    if(ans == 1) printf("NO");
+    else printf("YES");
+}
\ No newline at end of file