diff --git a/判断素数.cpp b/判断素数.cpp
new file mode 100644
index 0000000..fb6e358
--- /dev/null
+++ b/判断素数.cpp
@@ -0,0 +1,18 @@
+#include"stdio.h" 
+#include"math.h" 
+main(){ 
+int i,a; 
+for(i=101;i<=200;i++) 
+{ 
+
+for(a=2;a<=sqrt(i);a++) 
+{if(i%a!=0) 
+continue; 
+else if(a==(int)sqrt(i)) 
+printf("%d ",i); 
+else 
+continue; 
+} 
+} 
+} 
+