/in/foo.c: In function 'main':
/in/foo.c:6:11: warning: format '%ld' expects a matching 'long int *' argument [-Wformat=]
  scanf("%ld%ld");
           ^
/in/foo.c:6:14: warning: format '%ld' expects a matching 'long int *' argument [-Wformat=]
  scanf("%ld%ld");
              ^
/in/foo.c:7:5: warning: 'a' is used uninitialized in this function [-Wuninitialized]
     printf("%ld",a+b);
     ^~~~~~~~~~~~~~~~~
/in/foo.c:7:5: warning: 'b' is used uninitialized in this function [-Wuninitialized]