5.25 3.3

一、问题

 二、分析

三、代码

#include<iostream>
using namespace std;
void main()
{
long mul,number,k,a,b;
cout<<"Itexists following automorphic nmbers small than 100000:"<<endl;
for(number=0;number<100000;number++)
{
for(mul=number,k=1;(mul/=10)>0;k*=10);
a=k*10;
mul=0;
b=10;
while(k>0)
{
mul=(mul+(number%(k*10))*(number%b-number%(b/10)))%a;
k/=10;
b*=10;
}
if(number==mul)
cout<<number<<endl;
}
}

四、结果