c++ - Xml Parser - string::find -

i trying parse string contains line of xml file.

std::string temp = "<album>underclass hero</album>"; int f = temp.find(">"); int l = temp.find("</"); std::string _line = temp.substr(f + 1, l-2); 

this part of code of function should return parsed string. expected returns underclass hero. instead got underclass hero< /alb
(here between '<' , '/' space because couldn't write them together).

i looked std::string::find several times , said returns, if existing, position of first character of first match. here gives me last character of string, in variable l.
f fine.

link std::string::find

so can tell me i'm doing wrong?

the second argument takes length of substring want extract. can fix code way:

#include <string> #include <iostream>  int main() {     std::string temp = "<album>underclass hero</album>";     int f = temp.find(">");     int l = temp.find("</");     std::string line = temp.substr(f + 1, l - f - 1);        //                                    ^^^^^^^^^ } 

here live example.

also, careful names such _line. per paragraph 17.6.4.3.2/1 of c++11 standard:

[...] each name begins underscore reserved implementation use name in global namespace.