/in/foo.cc: In function 'int main()':
/in/foo.cc:6:19: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'int' [-Wformat=]
  scanf("%d %d",a,b);
                   ^
/in/foo.cc:6:19: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'int' [-Wformat=]
/in/foo.cc:6:7: warning: 'a' is used uninitialized in this function [-Wuninitialized]
  scanf("%d %d",a,b);
  ~~~~~^~~~~~~~~~~~~
/in/foo.cc:6:7: warning: 'b' is used uninitialized in this function [-Wuninitialized]