/in/foo.cc: In function 'int main()':
/in/foo.cc:7:15: warning: comparison of constant '10' with boolean expression is always true [-Wbool-compare]
    7 |         if(0<P<=10)
      |            ~~~^~~~
/in/foo.cc:7:13: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
    7 |         if(0<P<=10)
      |            ~^~
/in/foo.cc:11:16: warning: comparison of constant '100' with boolean expression is always true [-Wbool-compare]
   11 |         if(20<P<=100)
      |            ~~~~^~~~~
/in/foo.cc:11:14: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
   11 |         if(20<P<=100)
      |            ~~^~