delete pics to save space

history_source/ccf 入门篇/U4/4.3.4.cpp

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+#include<iostream>
+#include<string>
+#include<sstream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	stringstream num;
+	string j;
+	int a,b;
+	bool z,x;
+	while(true)
+	{
+		cin>>a;
+		z=0;
+		if(a<0){z=1;a=abs(a);}
+		b=0;
+		do
+		{
+			b=b*10+a%10;
+			a/=10;
+		}while(a>0);
+		a=b;
+		if(z==1) a=0-a;
+		cout<<a<<endl;
+	}
+}