diff --git a/判断素数 b/判断素数
index e69de29..b52e40c 100644
--- a/判断素数
+++ b/判断素数
@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <math.h>
+int main() {
+	int n,i,q;
+    int c = 0;
+	scanf("%d", &n);
+    q = sqrt(n);
+	for (i = 2; i <= q; i++ )
+     {
+		if(n % i  == 0)
+         c++;
+	}
+	if (c ==0)
+     {
+		 printf("%d是素数\n", n);
+	 }
+   else {
+		 printf("%d不是素数\n", n);
+    	}
+ 
+	return 0;
+}
\ No newline at end of file