foo.cc: In function ‘int main()’:
foo.cc:11:58: error: expected primary-expression before ‘;’ token
   11 |                                 cout<<a<<' '<<b<<' '<<c<<;
      |                                                          ^
foo.cc:13:58: error: expected primary-expression before ‘;’ token
   13 |                                 cout<<a<<' '<<c<<' '<<b<<;
      |                                                          ^
foo.cc:15:50: error: expected primary-expression before ‘;’ token
   15 |                         cout<<c<<' '<<a<<' '<<b<<;
      |                                                  ^
foo.cc:19:58: error: expected primary-expression before ‘;’ token
   19 |                                 cout<<b<<' '<<c<<' '<<a<<;
      |                                                          ^
foo.cc:21:58: error: expected primary-expression before ‘;’ token
   21 |                                 cout<<c<<' '<<b<<' '<<a<<;
      |                                                          ^
foo.cc:23:50: error: expected primary-expression before ‘;’ token
   23 |                         cout<<b<<' '<<a<<' '<<c<<;
      |                                                  ^