C语言小技巧之怎么找到需要的部分

string stemp = "H://lenovo//视频标注-lenovo//视频标注-lenovo//annotation_haoyu//video1_20161104150102.avi";
int last = stemp.find_last_of(".");
int begin1 = stemp.find_last_of("\\");
int begin2 = stemp.find_last_of("/");
int begin = max(begin1, begin2);
string name = stemp.substr(begin + 1, last - begin - 1);
cout << name.c_str();
return 1;