C++ how to pass vector of objects by reference into a function, then into next function? -


i'm hoping can provide assistance here. here relevant portion of code i'm stuck on currently:

/////////////////////////////////////////////////////////////////////////////////////////////////// void matchblobs(std::vector<blob> &existingblobs, std::vector<blob> &currentframeblobs) {      (auto &existingblob : existingblobs) {         existingblob.blncurrentmatchfoundornewblob = false;     }      (auto &currentframeblob : currentframeblobs) {          int intindexofleastdistance = 0;         double dblleastdistance = 1000000.0;          (unsigned int = 0; < existingblobs.size() - 1; i++) {             if (existingblobs[i].blnstillbeingtracked == true) {                 double dbldistance = distancebetweenblobs(currentframeblob, existingblobs[i]);                  if (dbldistance < dblleastdistance) {                     dblleastdistance = dbldistance;                     intindexofleastdistance = i;                 }             }         }          if (dblleastdistance < currentframeblob.dbldiagonalsize * 1.5) {             addblobtoexistingblobs(currentframeblob, existingblobs, intindexofleastdistance); // !!!! compiler error 2nd arg on line !!!!!!!         } else {             addnewblob(currentframeblob, existingblobs);         }      }      (auto &existingblob : existingblobs) {         if (existingblob.blncurrentmatchfoundornewblob == false) {             existingblob.blnstillbeingtracked = false;         }      }  }  /////////////////////////////////////////////////////////////////////////////////////////////////// void addblobtoexistingblobs(blob &currentframeblob, std::vector<blob> &existingblobs, int &intindex) {      existingblobs[intindex].contour = currentframeblob.contour;     existingblobs[intindex].boundingrect = currentframeblob.boundingrect;     existingblobs[intindex].ptcurrentcenter = currentframeblob.ptcurrentcenter;     existingblobs[intindex].dbldiagonalsize = currentframeblob.dbldiagonalsize;     existingblobs[intindex].dblaspectratio = currentframeblob.dblaspectratio;      existingblobs[intindex].vectorofallactualpoints.push_back(currentframeblob.ptcurrentcenter);      existingblobs[intindex].blnstillbeingtracked = true;     existingblobs[intindex].blncurrentmatchfoundornewblob = true; }

as noted on comment in code, i'm getting compiler error on line:

addblobtoexistingblobs(currentframeblob, existingblobs, intindexofleastdistance); // !!!! compiler error 2nd arg on line !!!!!!!

the error is:

error c2664 'void addblobtoexistingblobs(blob &,blob &,int &)': cannot convert argument 2 'std::vector<blob,std::allocator<_ty>>' 'blob &'  objecttrackingcpp   c:\users\cdahms\documents\visual studio 2015\projects\objecttrackingcpp2\objecttrackingcpp.cpp  186

can shed light on i'm doing wrong here? can find plenty of c++ examples of passing 1 basic data type variable (int, double, etc.) reference unable find examples involving passing vector of objects 1 function, function.

i'm using compiler ships visual studio 2015 community, default options chosen if makes difference.

i'm not sure direction go here, assistance appreciated.

it appears - error message - compiler knows function 

void addblobtoexistingblobs(blob&, blob&, int&);

whereas, in implementation of 

void matchblobs(std::vector<blob>&, std::vector<blob>&);

a function name of addblobtoexistingblobs used, different prototype, namely

void addblobtoexistingblobs(blob& ,std::vector<blob>&, int&);

have checked that, somewhere in code, haven't prototype addblobtoexistingblobs function gets compiler confused ?


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