Compare versions as strings

Question

Comparing version numbers as strings is not so easy...
\"1.0.0.9\" > \"1.0.0.10\", but it\'s not correct.
The obvious way to do it properly is to parse these strings

Answer 1

int VersionParser(char* version1, char* version2) {

    int a1,b1, ret; 
    int a = strlen(version1); 
    int b = strlen(version2);
    if (b>a) a=b;
    for (int i=0;ia1) ret = 1 ; // second version is fresher
    else if (b1==a1) ret=-1; // versions is equal
    else ret = 0; // first version is fresher
    return ret;
}