2015华为实习生招聘机试模拟考1之密码截取

#include <iostream>using namespace std;int research2(char *str){int len = strlen(str);if (str == NULL || len < 1){return 0;}if (len < 2){return 1;}char *begin;char *end;int count = 0;int maxlen = 0;for (int i = 0; i < len; i++){for (int j = 0; j < len; j++){begin = str + i;end = (str + len - 1) - j;count = end - begin + 1;while (*begin == *end&&begin < end){begin++;end--;}if (end == begin || end < begin){if (count > maxlen){maxlen = count;}}}}return maxlen;}void main(){char str[50];cin >> str;int result = research2(str);cout << result << endl;}</iostream>