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Two notes:
1. I dont know whether C++ has a good split function for STL as the JAVA. Need to figure it out.
2. At the beginning, I tried to set tmp1 = tmp2 = INT_MIN. But one of test case does not work "1.0" and "1". So those two does not need to set be INT_MIN or INT_MAX every time. It should be 0 at this time.
1 class Solution { 2 public: 3 vector<string> splits(string s) { 4 vector<string> result; 5 int len = s.size(); 6 for (int i = len-1; i >= 0; i--) { 7 if (s[i] == ‘.‘) { 8 len = i; 9 } else if (i == 0 || s[i-1] == ‘.‘) { 10 result.push_back(s.substr(i, len - i)); 11 } 12 } 13 return result; 14 } 15 int compareVersion(string version1, string version2) { 16 if (version1.size() == 0 && version2.size() == 0) return 0; 17 if (version1.size() == 0) return -1; 18 if (version2.size() == 0) return 1; 19 vector<string> list1 = splits(version1); 20 vector<string> list2 = splits(version2); 21 int l1 = list1.size()-1, l2 = list2.size()-1; 22 while (l1 >= 0 || l2 >= 0) { 23 int tmp1 = 0, tmp2 = 0; 24 if (l1 >= 0) { 25 tmp1 = stoi(list1[l1--]); 26 } 27 if (l2 >= 0) { 28 tmp2 = stoi(list2[l2--]); 29 } 30 if (tmp1 > tmp2) return 1; 31 else if (tmp1 < tmp2) return -1; 32 } 33 return 0; 34 } 35 };
LeetCode – Refresh – Compare Version Numbers
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原文地址：http://www.cnblogs.com/shuashuashua/p/4349274.html
