foo.cc: In function ‘int main()’:
foo.cc:19:25: error: expected ‘;’ before ‘}’ token
   19 |                 base = 2
      |                         ^
      |                         ;
   20 |         }
      |         ~                
foo.cc:7:32: warning: unused variable ‘A’ [-Wunused-variable]
    7 |         long long int base = 2,A,C,V;
      |                                ^
foo.cc:7:34: warning: unused variable ‘C’ [-Wunused-variable]
    7 |         long long int base = 2,A,C,V;
      |                                  ^
foo.cc:7:36: warning: unused variable ‘V’ [-Wunused-variable]
    7 |         long long int base = 2,A,C,V;
      |                                    ^