/in/foo.c: In function 'main':
/in/foo.c:6:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
  scanf("%d",n);
          ^
/in/foo.c:19:5: error: expected expression before '/' token
   a=/10;
     ^
/in/foo.c:38:9: warning: unknown escape sequence: '\d'
  printf("%d\d",d);
         ^~~~~~