ProjectEuler 004题

 1 #include<iostream>

 2 using namespace std;

 3

 4 int main() {

 5     bool isPalindromic (int num);

 6     int res = 0;

 7

 8     for(int i = 100; i < 1000 ; i++)

 9         for(int j = 100; j < 1000; j++) {

10             if( isPalindromic(i*j) && i*j > res)

11                 res = i*j;

12         }

13     cout << res;

14     system("pause");

15     return 0;

16 }

17 //判断回文

18 bool isPalindromic(int num) {

19     int rev_num = 0;

20     int m = num;//商

21     while(m != 0) {

22         rev_num = rev_num * 10 + m%10;

23         m = m/10;

24     }

25     if( rev_num == num)

26         return true;

27     else

28         return false;

29 }

ProjectEuler 004题