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The below solution should be simple enough as per the title "How to declare a global variable that could be used in the entire program " . If you want to use it in a different file then make use of extern keyword.
16 From Here: A global variable in C/C++ is a variable which can be accessed from any module in your program. int myGlobalVariable; This allocates storage for the data, and tells the compiler that you want to access t...
Can someone explain when you're supposed to use the static keyword before global variables or constants defined in header files? For example, lets say I have a header file with the line: const f...
Best way to declare and define global variables The clean, reliable way to declare and define global variables is to use a header file to contain an extern declaration of the variable. The header is included by the on...
How to declare a global variable in C++ Asked 13 years, 8 months ago Modified 5 months ago Viewed 449k times
22 A more C++-like way would be using a class member, syntactically indicated by the static keyword. Class member variables have implicit external linkage.
Thank you. So, if i declare a global variable in an header file without the extern keyword, the source files that include the header does not see it?
108 Global variables are not extern nor static by default on C and C++. When you declare a variable as static, you are restricting it to the current source file.
8 The scope is whatever scope the using declaration is in. If this is global scope, then it will be at global scope. If it is in global scope of a header file, then it will be in the global scope of every source file ...
The keyword static is one which has several meanings in C++ that I find very confusing and I can never bend my mind around how its actually supposed to work. From what I understand there is static storage duration, wh...
