Are global variables bad? [closed]

Are global variables bad? [closed]

c++ c global-variables

c

How do I use extern to share variables between source files?

c global-variables extern

c

Printing all global variables/local variables?

c variables gdb global-variables

c

shared global variables in C

c variables linker global-variables scope

c

Why are global and static variables initialized to their default values?

c++ c static global-variables

c

When is it ok to use a global variable in C?

c global-variables

c