c++ - Trouble with user defined data type in map -


goal : make map of student registrations via key, student number.

issue : seems reason when go add object map os crashes program.

structure of registration object:

private: std::string fname;          std::string lname;           long studentid;             unsigned semester;           vector<result> results;  //user defined data structure, tested , works

map declaration:

std::map<long, registration> studentregistrations;

i use studentid in object key. test created registration object, set it's studentid , passed following method in class encapsulates map, called registrar.

 void registrar::setregistration(registration& regist) {     studentregistrations[regist.getstudentid()] = regist; //crashes here }

my main:

int main() {     registration regist;     registrar r;      regist.setstudentid(200);     r.setregistration(regist); }

program returns -1073741819 <0xc00000005> on windows. if in anyway helps.


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