c++builder - global variable from Project1.cpp accesible in Unit1.cpp -


how declare global variable in project1.cpp , read in unit1.cpp ? question c++ builder

use extern keyword in unit1.cpp refer declaration project1.cpp.

for example, if in project1.cpp have

// global variable  int myglobalvar;

then in unit1.cpp should have

extern int myglobalvar;

however, practice questionable , should avoided. important programming principles modularization , decoupling can denied usage of global variables.


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