foo.cc: In function ‘int main()’:
foo.cc:7:10: error: ‘shu’ was not declared in this scope
    7 |     if(a<shu)
      |          ^~~
foo.cc:8:12: error: ‘ke’ was not declared in this scope
    8 |         if(ke<hb)
      |            ^~
foo.cc:8:15: error: ‘hb’ was not declared in this scope; did you mean ‘b’?
    8 |         if(ke<hb)
      |               ^~
      |               b