/in/foo.cc: In function 'int main()':
/in/foo.cc:6:25: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'int' [-Wformat=]
  scanf("%d%d",&num1,num2);
                         ^
/in/foo.cc:6:26: warning: 'num2' is used uninitialized in this function [-Wuninitialized]
  scanf("%d%d",&num1,num2);
                          ^