/in/foo.c:1:1: warning: data definition has no type or storage class
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'includeincludeusingnamespacestd' [-Wimplicit-int]
/in/foo.c:1:33: warning: return type defaults to 'int' [-Wimplicit-int]
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      |                                 ^~~~~~~
/in/foo.c: In function 'intmain':
/in/foo.c:1:43: error: 'doubleh' undeclared (first use in this function); did you mean 'double'?
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      |                                           ^~~~~~~
      |                                           double
/in/foo.c:1:43: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:1:51: error: 'r' undeclared (first use in this function)
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      |                                                   ^
/in/foo.c:1:50: warning: left-hand operand of comma expression has no effect [-Wunused-value]
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      |                                                  ^
/in/foo.c:1:53: error: 'cin' undeclared (first use in this function)
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      |                                                     ^~~
/in/foo.c:1:58: error: 'h' undeclared (first use in this function)
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      |                                                          ^
/in/foo.c:1:63: error: 'doublepi' undeclared (first use in this function); did you mean 'double'?
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      |                                                               ^~~~~~~~
      |                                                               double
/in/foo.c:1:82: error: 'doublev' undeclared (first use in this function); did you mean 'double'?
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      |                                                                                  ^~~~~~~
      |                                                                                  double
/in/foo.c:1:90: error: 'pi' undeclared (first use in this function)
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      |                                                                                          ^~
/in/foo.c:1:99: error: 'doublen' undeclared (first use in this function); did you mean 'double'?
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      |                                                                                                   ^~~~~~~
      |                                                                                                   double
/in/foo.c:1:115: error: 'v' undeclared (first use in this function)
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      |                                                                                                                   ^
/in/foo.c:1:117: error: 'cout' undeclared (first use in this function)
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      |                                                                                                                     ^~~~
/in/foo.c:1:121: error: expected ';' at end of input
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      |                                                                                                                         ^
      |                                                                                                                         ;
/in/foo.c:1:1: error: expected declaration or statement at end of input
    1 | includeincludeusingnamespacestd;intmain(){doubleh,r;cin>>h>>r;doublepi=3.1415926;doublev=pi*r*r*h;doublen=20*1000/v;cout
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.c:2: warning: control reaches end of non-void function [-Wreturn-type]