c++ - Is that possible to use a string as a name in opencv FileStorage -

c++ - Is that possible to use a string as a name in opencv FileStorage -

i'd write xml file using opencv filestorage object.

most of examples see works next

filestorage fs("d:\\1.xml" , filestorage::write); fs << "one" << 1;

i'd write section modified name variable , means text not have inserted in compile time. this:

string st = "1"; fs << st.c_str() << 1;

however maintain on getting run time error. it's refused work, have tried using opencv string type, stl string type , char* , still can't create work.

any help appreciated

this tricky one. looking in persistence.cpp have found error thrown because cv_isalpha checked on variable name. means variable name should origin letter!

try doing following:

int main() { string oname; oname = "a"; // now, crash if assign "number" characters, e.g "1" filestorage fs("test.yml", filestorage::write); fs << oname.c_str() << 1 ; homecoming 0; }

this should work.

edited: can set numbers in 'string' variable long begin letter (e.g. "a1"), works too.

c++ opencv