/in/foo.c: In function 'main':
/in/foo.c:10:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'long long unsigned int *' [-Wformat=]
  scanf("%d",&a);
          ^
/in/foo.c:20:17: warning: 'd' may be used uninitialized in this function [-Wmaybe-uninitialized]
   a0=(a0-d)*10+d/(c/10);
                ~^~~~~~~
/in/foo.c:20:20: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
   a0=(a0-d)*10+d/(c/10);
                  ~~^~~~