Scope resolution in C

[Subra]

Hi,

If I have the same varible defined in global as well as in local
scope, how to access global scope varible in a function having the same
local def.

#include<stdio.h>
static int a=25;
int main()
{
static int a = 10;
printf("%d",a);
}
#include<stdio.h>
static int a=25;
int main()
{
static int a = 10;
printf("%d",a); // How to access the global def??
}

 

[Richard Heathfield]

Subra said:

#include<stdio.h>
static int a=25;
int main()
{
static int a = 10;
printf("%d",a); // How to access the global def??

By removing the local def.

 

[CBFalconer]

If I have the same varible defined in global as well as in local
scope, how to access global scope varible in a function having
the same local def.

#include<stdio.h>
static int a=25;
int main()
{
static int a = 10;
printf("%d",a);
}

You don't. You are perfectly free to change the name of the local
variable.

 

[Kenny McCormack]

Subra said:


By removing the local def.

Or by turning the computer off.

But seriously, folks. Every other time this thread has come up,
somebody has come up with the solution. I'm surprised it hasn't
happened here yet.

#include<stdio.h>
static int a=25;
int *getPointer2A() { return &a; }
int main()
{
int *ap = getPointer2A();
static int a = 10;

printf("local a = %d, global a = %d\n",a,*ap);
return 0; /* Just for you anal types; yes, I know about EXIT_SUCCESS */
}

(Untested; but the only thing I'm not sure about is the "static" - I
don't think that changes anything relevant, though)

 

[Guest]

Or by turning the computer off.

But seriously, folks. Every other time this thread has come up,
somebody has come up with the solution. I'm surprised it hasn't
happened here yet.

#include<stdio.h>
static int a=25;
int *getPointer2A() { return &a; }
int main()
{
int *ap = getPointer2A();
static int a = 10;

printf("local a = %d, global a = %d\n",a,*ap);
return 0; /* Just for you anal types; yes, I know about EXIT_SUCCESS */
}

(Untested; but the only thing I'm not sure about is the "static" - I
don't think that changes anything relevant, though)

It seems okay to me, and you're right, in this case the "static" for
the second definition of a doesn't change anything. I don't see a need
for both a helper function and a pointer, though: you can remove
either.

#include <stdio.h>
static int a=25;
int main()
{
int *ap = &a;
static int a = 10;

printf("local a = %d, global a = %d\n",a,*ap);
return 0;
}

or

#include <stdio.h>
static int a=25;
int *getPointer2A() { return &a; }
int main()
{
static int a = 10;

printf("local a = %d, global a = %d\n",a,*getPointer2A());
return 0;
}