delete pics to save space

history_source/ccf 入门篇/U5/5.2.5.cpp

@@ -0,0 +1,23 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+bool pan(int a)
+{
+	do
+	{
+		if(a%10==0) return 0;
+		a/=10;
+	}
+	while(a>0);
+	return 1;
+}
+int main()
+{
+	int x=sqrt(111111111)+1,a;
+	for(;x*x<=999999999;x++)
+	{
+		a=x*x; 
+		if(pan(a)) cout<<x<<"^2="<<a<<endl;
+	}
+    while(true); 
+}