找规律的：
1 #include <iostream> 2 #include <cmath> 3 4 using namespace std; 5 6 int main() 7 { 8 int a,b; 9 while(cin>>a>>b) 10 { 11 b=b%4;//最多就4种情况 12 a=a%10; 13 switch(b) 14 { 15 case 1: 16 cout<<a%10; break; 17 case 2: 18 cout<<a*a%10; break; 19 case 3: 20 cout<<a*a*a%10; break; 21 case 0: 22 cout<<a*a*a*a%10; 23 } 24 25 cout<<endl; 26 } 27 28 return 0; 29 }