/in/foo.c: In function 'g':
/in/foo.c:11:8: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
 return c;
        ^
/in/foo.c: In function 'main':
/in/foo.c:17:5: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
     printf("%d\n",g(a,b));
     ^~~~~~~~~~~~~~~~~~~~~