/in/foo.c: In function 'main':
/in/foo.c:6:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'long int *' [-Wformat=]
  scanf("%d",&n);
          ^
/in/foo.c:12:11: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long int' [-Wformat=]
  printf("%d",s);
           ^
/in/foo.c:4:13: warning: unused variable 'x' [-Wunused-variable]
  long n,s=0,x;
             ^