/in/foo.cc: In function 'int main()':
/in/foo.cc:12:9: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  if(s=65);
         ^
/in/foo.cc:12:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(s=65);
  ^~
/in/foo.cc:13:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
  {
  ^
/in/foo.cc:9:6: warning: unused variable 'a' [-Wunused-variable]
  int a;
      ^