标签：amp git back nbsp color return ring ima res
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
注意：版本格式可能会有多个子版本
class Solution { public: int compareVersion(string version1, string version2) { vector<int> arr_v1,arr_v2; int pos1_pre = 0, pos2_pre = 0, pos1=version1.find_first_of(‘.‘),pos2=version2.find_first_of(‘.‘); while(pos1!=-1){ arr_v1.push_back(atoi(version1.substr(pos1_pre,pos1).c_str())); pos1_pre = pos1+1; pos1 = version1.find_first_of(‘.‘,pos1_pre); } arr_v1.push_back(atoi(version1.substr(pos1_pre).c_str())); while(pos2!=-1){ arr_v2.push_back(atoi(version2.substr(pos2_pre,pos2).c_str())); pos2_pre = pos2+1; pos2 = version2.find_first_of(‘.‘,pos2_pre); } arr_v2.push_back(atoi(version2.substr(pos2_pre).c_str())); int size1 = arr_v1.size(); int size2 = arr_v2.size(); int size = min(size1,size2); for(int i = 0; i < size; i++){ if(arr_v1[i] > arr_v2[i]) return 1; else if(arr_v1[i] < arr_v2[i]) return -1; } if(size == size1){ for(int i = size; i < size2; i++){ if(arr_v2[i]!=0) return -1; } return 0; } else{ for(int i = size; i < size1; i++){ if(arr_v1[i]!=0) return 1; } return 0; } } };
165. Compare Version Numbers (String)
标签：amp git back nbsp color return ring ima res
原文地址：http://www.cnblogs.com/qionglouyuyu/p/6602298.html
