/in/foo.c: In function 'main':
/in/foo.c:5:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'long int *' [-Wformat=]
  scanf("%d",&a);
          ^
/in/foo.c:13:2: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
  printf("%ld",(a1-b*wei/10)*10+b);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~