foo.cc: In function 'int main()':
foo.cc:12:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   12 |   if ((y % 4 == 0) && (y % 100 != 0) || y % 400 == 0)
      |       ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
foo.cc:18:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   18 |   if ((y % 4 == 0) && (y % 100 != 0) || y % 400 == 0)
      |       ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
foo.cc:24:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   24 |   if ((y % 4 == 0) && (y % 100 != 0) || y % 400 == 0)
      |       ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
foo.cc:30:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   30 |   if ((y % 4 == 0) && (y % 100 != 0) || y % 400 == 0)
      |       ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
foo.cc:36:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   36 |   if ((y % 4 == 0) && (y % 100 != 0) || y % 400 == 0)
      |       ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
foo.cc:42:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   42 |   if ((y % 4 == 0) && (y % 100 != 0) || y % 400 == 0)
      |       ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
foo.cc:48:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   48 |   if ((y % 4 == 0) && (y % 100 != 0) || y % 400 == 0)
      |       ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
foo.cc:54:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   54 |   if ((y % 4 == 0) && (y % 100 != 0) || y % 400 == 0)
      |       ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
foo.cc:60:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   60 |   if ((y % 4 == 0) && (y % 100 != 0) || y % 400 == 0)
      |       ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
foo.cc:66:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   66 |   if ((y % 4 == 0) && (y % 100 != 0) || y % 400 == 0)
      |       ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
foo.cc:71:10: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized]
   71 |  cout << s;
      |          ^

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