foo.cc: In function 'int main()':
foo.cc:9:6: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    9 |  if(e=43)
      |     ~^~~
foo.cc:13:8: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   13 |    if(e=45)
      |       ~^~~
foo.cc:17:10: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   17 |      if(e=42)
      |         ~^~~
foo.cc:21:9: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   21 |     if(e=47)
      |        ~^~~

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