How can I access a shadowed global variable in C?

by

If your file-scope variable is not static, then you can use a declaration that uses extern in a nested scope:

int c;

int main() {
    {
        int c = 0;
        // now, c shadows ::c. just re-declare ::c in a 
        // nested scope:
        {
            extern int c;
            c = 1;
        }
        // outputs 0
        printf("%d\n", c);
    }
    // outputs 1
    printf("%d\n", c);
    return 0;
}

If the variable is declared with static, i don’t see a way to refer to it.

More Related Contents:

  1. shared global variables in C
  2. Why can’t I assign values to global variables outside a function in C?
  3. How do I use extern to share variables between source files?
  4. C comma operator
  5. When is it ok to use a global variable in C?
  6. Why enclose blocks of C code in curly braces?
  7. Printing all global variables/local variables?
  8. Global variables in C are static or not?
  9. Why are global variables bad, in a single threaded, non-os, embedded application
  10. Finding the address range of the data segment
  11. Why can’t I create an array with size determined by a global variable?
  12. Are global variables always initialized to zero in C? [duplicate]
  13. Malloc function (dynamic memory allocation) resulting in an error when it is used globally
  14. declaring a variable-length array as a global variable in C
  15. Difference between static global variable and non-static global variable in C [duplicate]
  16. Do variables declared in a header file give separate copies of the variables to each .c file that includes the header?
  17. Definition of global variables using a non constant initializer
  18. Why can I define a variable twice in C?
  19. How to count the number of times a while loop is executed
  20. please help me to find the error in this C code [closed]
  21. Using the pow() function with integers in C
  22. Why is scanf() causing infinite loop in this code?
  23. Why does the arrow (->) operator in C exist?
  24. Hexadecimal string to byte array in C
  25. C – why is strcpy() necessary
  26. How to implement Server Name Indication (SNI)
  27. Variable definition inside switch statement
  28. How can I create a Makefile for C projects with SRC, OBJ, and BIN subdirectories?
  29. warning: return type defaults to ‘int’ [-Wreturn-type]
  30. How do you do exponentiation in C?

Leave a Comment