Got these errors

[nyngwang]

✘:130 ~/GitHub/uva-tool % chmod +x install.sh                                                                                                                                            13:32:24
✔ ~/GitHub/uva-tool %                                                                                                                                                                    13:32:28
✔ ~/GitHub/uva-tool % ./install.sh                                                                                                                                                       13:32:32
src/uva-tool.cpp:94:26: error: unknown type name 'pid_num_cvs'
            ifstream fp (pid_num_cvs);
                         ^
src/uva-tool.cpp:94:25: warning: parentheses were disambiguated as a function declaration [-Wvexing-parse]
            ifstream fp (pid_num_cvs);
                        ^~~~~~~~~~~~~
src/uva-tool.cpp:94:26: note: add a pair of parentheses to declare a variable
            ifstream fp (pid_num_cvs);
                         ^
                         (
src/uva-tool.cpp:97:53: error: use of undeclared identifier 'pid_num_cvs'
                cerr << "Unable to open file : " << pid_num_cvs << "\n";
                                                    ^
src/uva-tool.cpp:225:40: warning: implicit conversion changes signedness: 'int' to 'nlohmann::basic_json::size_type' (aka 'unsigned long') [-Wsign-conversion]
                sid (json_subs["subs"][i][0]);
                     ~~~~~~~~~         ^
src/uva-tool.cpp:226:49: warning: implicit conversion changes signedness: 'int' to 'nlohmann::basic_json::size_type' (aka 'unsigned long') [-Wsign-conversion]
                problem_name (json_subs["subs"][i][1]);
                              ~~~~~~~~~         ^
src/uva-tool.cpp:227:46: warning: implicit conversion changes signedness: 'int' to 'nlohmann::basic_json::size_type' (aka 'unsigned long') [-Wsign-conversion]
                verdict ( (json_subs["subs"][i][2]) );
                           ~~~~~~~~~         ^
src/uva-tool.cpp:228:69: warning: implicit conversion changes signedness: 'int' to 'nlohmann::basic_json::size_type' (aka 'unsigned long') [-Wsign-conversion]
                runtime (json_subs["subs"][i][3], json_subs["subs"][i][2]);
                                                  ~~~~~~~~~         ^
src/uva-tool.cpp:228:44: warning: implicit conversion changes signedness: 'int' to 'nlohmann::basic_json::size_type' (aka 'unsigned long') [-Wsign-conversion]
                runtime (json_subs["subs"][i][3], json_subs["subs"][i][2]);
                         ~~~~~~~~~         ^
src/uva-tool.cpp:229:45: warning: implicit conversion changes signedness: 'int' to 'nlohmann::basic_json::size_type' (aka 'unsigned long') [-Wsign-conversion]
                uva_rank (json_subs["subs"][i][6]);
                          ~~~~~~~~~         ^
src/uva-tool.cpp:230:45: warning: implicit conversion changes signedness: 'int' to 'nlohmann::basic_json::size_type' (aka 'unsigned long') [-Wsign-conversion]
                language (json_subs["subs"][i][5]);
                          ~~~~~~~~~         ^
src/uva-tool.cpp:231:41: warning: implicit conversion changes signedness: 'int' to 'nlohmann::basic_json::size_type' (aka 'unsigned long') [-Wsign-conversion]
                date (json_subs["subs"][i][4]);
                      ~~~~~~~~~         ^
src/uva-tool.cpp:240:11: error: use of undeclared identifier 'curlfunc'
    cmd = curlfunc + " --http1.1 https://uhunt.onlinejudge.org/api/uname2uid/" + \
          ^
src/uva-tool.cpp:241:18: error: use of undeclared identifier 'err'
          name + err;
                 ^
src/uva-tool.cpp:250:11: error: use of undeclared identifier 'curlfunc'
    cmd = curlfunc + " --http1.1 https://uhunt.onlinejudge.org/api/subs-user-last/" + \
          ^
src/uva-tool.cpp:251:31: error: use of undeclared identifier 'err'
          uid + "/" + range + err;
                              ^
src/uva-tool.cpp:259:29: error: use of undeclared identifier 'cookie_file'; did you mean 'cookie_jar'?
        string cookie_jar = cookie_file;
                            ^~~~~~~~~~~
                            cookie_jar
src/uva-tool.cpp:259:16: note: 'cookie_jar' declared here
        string cookie_jar = cookie_file;
               ^
src/uva-tool.cpp:263:26: error: use of undeclared identifier 'curlfunc'
            string cmd = curlfunc + " -f -L -s http://onlinejudge.org |";
                         ^
src/uva-tool.cpp:330:26: error: use of undeclared identifier 'curlfunc'
            string cmd = curlfunc + " -X POST -f -L -s --compressed ";
                         ^
src/uva-tool.cpp:346:26: error: use of undeclared identifier 'curlfunc'
            string cmd = curlfunc + \
                         ^
9 warnings and 10 errors generated.