Main.cc:8:13: error: extended character × is not valid in an identifier
    8 |   float j=5/9×(i-32);
      |             ^
Main.cc: In function ‘int main()’:
Main.cc:8:13: error: unable to find numeric literal operator ‘operator""×’
    8 |   float j=5/9×(i-32);
      |             ^~
Main.cc:8:13: note: use ‘-fext-numeric-literals’ to enable more built-in suffixes