extern

[mehak]

y is it giving an error...i hv declared it an extern variable then y does it say C:\Users\Mehak\Desktop\Untitled1.o:Untitled1.c|| undefined reference to `i'|
C:\Users\Mehak\Desktop\Untitled1.o:Untitled1.c|| undefined reference to `i'|
||=== Build finished: 2 errors, 0 warnings (0 minutes, 0 seconds) ===|

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

[AbstractionAnon]

Because you've said i exists in another translation unit, but you have no other translation unit defining i.

Where do you think i is defined?