foo.cc: In function 'int main()':
foo.cc:11:12: error: expected '(' before 'else'
   11 |         if else(x<10)
      |            ^~~~
      |            (
foo.cc:15:12: error: expected '(' before 'else'
   15 |         if else(x<15)
      |            ^~~~
      |            (
foo.cc:19:12: error: expected '(' before 'else'
   19 |         if else(x<30)
      |            ^~~~
      |            (
foo.cc:23:12: error: expected '(' before 'else'
   23 |         if else(x>30)
      |            ^~~~
      |            (

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