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Compare two version numbers version1 and version2.
If version1 > version2 return 1, if version1 < version2 return -1, otherwise return 0.
You may assume that the version strings are non-empty and contain only digits and the .
character.
The .
character does not represent a decimal point and is used to separate number sequences.
For instance, 2.5
is not "two and a half" or "half way to version three", it is the fifth second-level revision of the second first-level revision.
Here is an example of version numbers ordering:
0.1 < 1.1 < 1.2 < 13.37
class Solution { public: vector<string> getAllVersionString(string version1){ vector<string> allVersion1; string oneVersion1; for(int i = 0; i < version1.size(); ++i){ if(version1[i] != ‘.‘){ oneVersion1.push_back(version1[i]); }else{ allVersion1.push_back(oneVersion1); oneVersion1.clear(); } } allVersion1.push_back(oneVersion1); return allVersion1; } int compareVer(vector<string> allVersion1, vector<string> allVersion2){ for(int i = 0; i < allVersion1.size(); ++i){ if(i < allVersion2.size()){ if(atoi(allVersion1[i].c_str()) < atoi(allVersion2[i].c_str())){ return -1; }else if(atoi(allVersion1[i].c_str()) > atoi(allVersion2[i].c_str())){ return 1; } }else{ if(atoi(allVersion1[i].c_str()) > 0){ return 1; } } } return 0; } int compareVersion(string version1, string version2) { vector<string> allVersion1 = getAllVersionString(version1); vector<string> allVersion2 = getAllVersionString(version2); int result = 0; if(allVersion1.size() >= allVersion2.size()){ result = compareVer(allVersion1, allVersion2); }else if(allVersion2.size() > allVersion1.size()){ result = -compareVer(allVersion2, allVersion1); } return result; } };
http://www.waitingfy.com/archives/1683
LeetCode Compare Version Numbers
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原文地址:http://blog.csdn.net/fox64194167/article/details/45421715