/in/foo.c: In function 'main':
/in/foo.c:8:9: warning: unused variable 'j' [-Wunused-variable]
     int j = 1;
         ^
/in/foo.c:19:5: warning: 'out' may be used uninitialized in this function [-Wmaybe-uninitialized]
     printf("%d",out);
     ^~~~~~~~~~~~~~~~