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165.compare-version-numbers.cpp
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165.compare-version-numbers.cpp
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/*
* @lc app=leetcode id=165 lang=cpp
*
* [165] Compare Version Numbers
*/
// @lc code=start
class Solution {
public:
int compareVersion(string version1, string version2) {
int a,b;
string tmp;
int i,j;
i=version1.find(".");
j=version2.find(".");
while(true) {
if (version1.length()==0) {
a=0;
}else if (i!=string::npos) {
a=atoi(version1.substr(0,i).c_str());
version1=version1.substr(i+1, version1.length()-i-1);
} else {
a=atoi(version1.c_str());
version1="";
}
if (version2.length()==0) {
b=0;
} else if (j!=string::npos) {
b=atoi(version2.substr(0,j).c_str());
version2=version2.substr(j+1, version2.length()-j-1);
} else {
b=atoi(version2.c_str());
version2="";
}
if (a<b) {
return -1;
} else if (a>b) {
return 1;
}
if (i==string::npos&&j==string::npos) {
break;
}
i=version1.find(".");
j=version2.find(".");
}
return 0;
}
};
// @lc code=end