/in/foo.cc: In function 'int main()':
/in/foo.cc:5:16: warning: format '%ld' expects argument of type 'long int*', but argument 2 has type 'char*' [-Wformat=]
  scanf("%ld",&f);
              ~~^
/in/foo.cc:10:16: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'int' [-Wformat=]
  printf("%ld",x);
                ^