Question

I have a program that needs two different values of the same variable depending on the state of the program.

Function is declared in header (test.inc):

void function_a(int pr)
{
    if (pr == 1)
    enum{
      a = 5,
      b = 5,
      c = 5,
    };
    else
    enum{
      a = 2,
      b = 2,
      c = 2,
    };
}

And program: (main.c)

int main() {
    function_a(1);        
    printf("%d",a);
    return (EXIT_SUCCESS);
}

After compiling it say:

main.c:26: error: `a’ undeclared (first use in this function)
main.c:26: error: (Each undeclared identifier is reported only once
main.c:26: error: for each function it appears in.)

How to make a global declaration using enum in function located in header?
Thank you

Answer 1

There’s no use for an enum here, you just need 3 global variables and set those:

int a,b,c;

void function_a(int pr)
{
    if (pr == 1) {
      a = 5,
      b = 5,
      c = 5,
    } else {
      a = 2;
      b = 2;
      c = 2;
    }
}

int main() {
    function_a(1);        
    printf("%d",a);
    return (EXIT_SUCCESS);
}