Unresolved external symbol

[gridolfi]

Dear all...
I receive this error from the compiler:

sem.obj : error LNK2019: unresolved external symbol "public: __thiscall MissionDefinition::MissionDefinition(double *,double *,int *,int *)" (??0MissionDefinition@@QAE@PAN0PAH1@Z) referenced in function "public: void __thiscall SEM::missionFunctions(void)" (?missionFunctions@SEM@@QAEXXZ)

I have a Qt application the name is sem.h sem.cpp
From sem.cpp I call a function of MissionDefinition Class thanks to the function missionFunctions belonging to SEM....

What do you think the problem is?
Thanks a lot

Guido

[Bazzy]

Are you linking everything properly?

[gridolfi]

Hi Bazzy...
I think I am.....one never knows...what do you mean exactly?

[Bazzy]

When you have multiple source file you should link them so that they get into the same program file.
Which compiler/IDE are you using?