Expected ')' before string - c++

Question

I have tried a lot of different solutions to this problem and I just can't seem to figure out why the compiler continues to give me this error in my header file. If somebody could please give me some insight, that would be very much appreciated. EDIT: Sorry forgot which line is giving the error. It's in the header file the line: Date(string mstr, int dd, int yy);
And yes I know the this = new Date... is a bad solution, I'm just working it out a bit ;)
Header:
#include <string>
#ifndef DATE_H
#define DATE_H
class Date{
public:
Date(int mm, int dd, int yy);
Date(string mstr, int dd, int yy);
void print();
void printFullDate();
void prompt();
void setMonth(int);
void setDay(int);
void setYear(int);
int getMonth();
int getDay();
int getYear();
static const int monthsPerYear = 12;
private:
int month;
int day;
int year;
int checkDay(int);
};
#endif
And here is the implementation if you need it(It's not totally finished, I'm just trying to test out some of the functions I've written):
#include <iostream>
#include <stdexcept>
#include "Date.h"
using namespace std;
Date::Date(int mm, int dd, int yy){
setMonth(mm);
setYear(yy);
setDay(dd);
}
Date::Date(string mstr, int dd, int yy){
cout << "It's working";
}
int Date::getDay(){
return day;
}
int Date::getMonth(){
return month;
}
int Date::getYear(){
return year;
}
void Date::setDay( int dd ){
day = checkDay(dd);
}
void Date::setMonth( int mm ){
if( mm > 0 && mm <= monthsPerYear)
month = mm;
else
throw invalid_argument("month must be 1-12");
}
void Date::setYear( int yy ){
year = yy;
}
int Date::checkDay( int testDay){
static const int daysPerMonth[ monthsPerYear + 1 ] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
if( testDay > 0 && testDay <= daysPerMonth[ getMonth() ])
return testDay;
if( getMonth() == 2 && testDay == 29 && (getYear() % 400 == 0 || ( getYear() % 4 == 0 && getYear() % 100 != 0 ) ) )
return testDay;
throw invalid_argument("Invalid day for current month and year");
}
void Date::print(){
}
void Date::printFullDate(){
}
void Date::prompt(){
int userChoice = 1;
int mm, dd, yy;
string monthStr;
while(userChoice != 3){
cout << "Enter 1 for format: MM/DD/YYYY" << endl;
cout << "Enter 2 for format: Month DD, YYYY" << endl;
cout << "Enter 3 to exit" << endl;
cout << "Choice: " << endl;
cin >> userChoice;
while(userChoice < 1 || userChoice > 3){
cout << "Please enter a number 1 - 3 for the formats above." << endl;
cout << "Choice: " << endl;
cin >> userChoice;
}
if(userChoice != 3){
switch(userChoice){
case 1:
cout << "Enter Month (1 - 12): ";
cin >> mm;
setMonth(mm);
cout << "Enter Day of Month: ";
cin >> dd;
setDay(dd);
cout << "Enter Year: ";
cin >> yy;
setYear(yy);
break;
case 2:
cout << "Enter Month Name: ";
cin >> monthStr;
cout << "Enter Day of Month: ";
cin >> dd;
cout << "Enter Year: ";
cin >> yy;
this = new Date(monthStr, dd, yy);
break;
default:
break;
}
}
}
}

Answer 1

Problem #1: Add an include directive for string
#include <string>
Problem #2: Use the fully qualified std::string rather than just string, or place a using-declaration before your class definition:
using std::string;
Problem #3: You cannot reassign the this pointer:
this = new Date(monthStr, dd, yy); // ERROR!
What you are trying to do should be probably re-written as:
*this = Date(monthStr, dd, yy);

Answer 2

use std::string or declare using namespace std; at the beginning of the code.