/in/foo.c: In function 'main':
/in/foo.c:7:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
  scanf("%d%d",a,b);
          ^
/in/foo.c:7:12: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'int' [-Wformat=]
  scanf("%d%d",a,b);
            ^
/in/foo.c:7:2: warning: 'a' is used uninitialized in this function [-Wuninitialized]
  scanf("%d%d",a,b);
  ^~~~~~~~~~~~~~~~~
/in/foo.c:7:2: warning: 'b' is used uninitialized in this function [-Wuninitialized]