/in/foo.cc: In function 'int main()':
/in/foo.cc:13:8: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  if(m=a)
        ^
/in/foo.cc:15:2: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
  else
  ^~~~
/in/foo.cc:17:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
   return 0;
   ^~~~~~