foo.cc: In function 'int DaysOfYear(int)':
foo.cc:14:9: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   14 |  if(year=IsLeapYear(year))
      |     ~~~~^~~~~~~~~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:37:9: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   37 |  if(year=IsLeapYear(year))
      |     ~~~~^~~~~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务