/in/foo.cc: In function 'int main()':
/in/foo.cc:52:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(c!=d)
  ^~
/in/foo.cc:53:10: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
   x*=c/d;y*=c/d;
          ^
/in/foo.cc:51:5: warning: unused variable 'temp' [-Wunused-variable]
  ll temp=ex(a1,a2,x,y);
     ^~~~