我编写的程序的某些错误给出了错误，但我找不到错误的解决方法。您能帮我吗？

编译程序时，出现一些错误，我找不到错误的解决方案。你能帮助我吗？ 错误（带有行号和列号）是：

ERROR1:24   49  [Error] request for member 'substr' in 'month.std::basic_string<_CharT, _Traits, _Alloc>::operator[]<char, std::char_traits<char>, std::allocator<char> >(((std::basic_string<char>::size_type)i))', which is of non-class type 'char'
ERROR2:44   16  [Error] expected ')' before ',' token
       44   17  [Error] expected primary-expression before 'int'
ERROR3:47   2   [Error] expected primary-expression before 'catch'
ERROR4:52   2   [Error] expected unqualified-id at end of input

#include<iostream>
#include<fstream>
#include<string>
using namespace std;
class Date{
    public:
        int day;
        string month;
        int year;
        Date(int d,string m,int y):day(d),month(m),year(y) {}// cons. func.
};
class Person{
    private:
        string first;
        string last;
        Date birthday; //member object.
    public:
        Person(string f,string l,int d,string m,int y): first(f),last(l),birthday(d,m,y){} //use member initialize for the member obj.
        void setMonth(string month){
          string months[12]={"January","February","March","April","May","June","July","August","September","October","November","December"};
          string months1[12];
          for(int i=0;i<11;i++) {
            months[i]=new char ;months[i];
             if(months[i].substr(0,3)==month[i].substr(0,3))  //ERROR 1 
               months[i]=month;   //
                               }
                }
        void printInfo(ostream){cout<<"Incorrect input for day/year:"<<birthday.day<<birthday.year<<endl;}

int main() {
    string first,last,month;
    int day,year;
    ifstream inp("inputfile.txt");
    Person p(first,last,day,month,year);
    const char *months[12]={"January","February","March","April","May","June","July","August","September","October","November","December"};
    while(!inp.eof()){
    try{
        inp>>first>>last>>day>>month>>year;
        if(year>2020 || day>30) throw year,day;
        for(int i=1;i<=12;++i)
            if(month!=months[i]) throw month;
            ofstream out("outputfile.txt");
    }
    catch(int year,int day){   //ERROR 2
        p.printInfo();
    }
    catch(string month){     //ERROR 3

        out<<"Incorrectly inputted month:"<<month<<"is corrected to"<<p.setMonth()<<endl;
}
    return 0;
}}    //ERROR 4