Converting date format? - c++

Question

#include <iostream>
#include <iomanip>
#include <string>
#include <fstream>
using namespace std;
// declares variables
string dayow;
string month;
string day;
string year;
int main()
{
cout << "Pick you day of the week (ex: Monday-Sunday)" << endl;
getline(cin, dayow);
cout << " " << endl;
cout << "Pick your month (ex: January-December)" << endl;
getline(cin, month);
cout << " " << endl;
cout << "Pick your day of the month (ex: 1-31)" << endl;
getline(cin, day);
cout << " " << endl;
cout << "Pick your year" << endl;
getline(cin, year);
cout << " " << endl;
cout << "This is your date.." << endl;
cout << dayow << ", " << month << " " << day << ", " << year << "." << endl;
cout << " " << endl;
cout << "Here are the 3 formats to display your date.." << endl;
cout << " " << endl;
cout << "1. " << month << " " << day << " was a " << dayow << " in " << year << endl;
cout << " " << endl;
std::string str = dayow;
std::string str1 = str.substr(0, 3);
std::string str = month;
std::string str2 = str.substr(0, 2);
std::string str = day;
std::string str3 = str.substr(0, 2);
std::string str = year;
std::string str4 = str.substr(0, 4);
std::cout << str1 << ", " << str2 << " " << str3 << " '" << str4 << endl;
return 0;
}
So what i'm trying to do here is get the user to input ex: Tuesday, March 22, 2012, then have 2 results come out. 1st being "January 1 was a Tuesday in 2012", that is fine as it is. Where the problem lies is the second result where I want "Tue, Mar 22, 2012" but the problem is on line 46 - 53, all of the strings are connecting to the first std:string str = dayow; so the output turns into TueTuTuTues!
Can anyone help?? thanks!
EDIT : Sorry if this is a noob questions :/ really new to coding!

Answer 1

Try this one: (some changes of your code)
#include <iomanip>
#include<iostream> // **add this header file**
#include <string>
#include <fstream>
using namespace std;
// declares variables
string dayow;
string month;
string day;
string year;
int main()
{
cout << "Pick you day of the week (ex: Monday-Sunday)" << endl;
getline(cin, dayow);
cout << " " << endl;
cout << "Pick your month (ex: January-December)" << endl;
getline(cin, month);
cout << " " << endl;
cout << "Pick your day of the month (ex: 1-31)" << endl;
getline(cin, day);
cout << " " << endl;
cout << "Pick your year" << endl;
getline(cin, year);
cout << " " << endl;
cout << "This is your date.." << endl;
cout << dayow << ", " << month << " " << day << ", " << year << "." << endl;
cout << " " << endl;
cout << "Here are the 3 formats to display your date.." << endl;
cout << " " << endl;
cout << "1. " << month << " " << day << " was a " << dayow << " in " << year << endl;
cout << " " << endl;
// **changes start here**
string str1 = dayow.substr(0, 3);
string str2 = month.substr(0, 3);
string str3 = day.substr(0, 2);
string str4 = year.substr(0, 4);
cout << str1 << ", " << str2 << " " << str3 << " ," << str4 << endl;
return 0;
}

Answer 2

Which compiler do you use? Your program shouldn't compile.
Add #include <iostream>
You cann't define few variables with same name C++.
So replace
std::string str = dayow;
std::string str1 = str.substr(0, 3);
std::string str = month;
std::string str2 = str.substr(0, 2);
std::string str = day;
std::string str3 = str.substr(0, 2);
std::string str = year;
std::string str4 = str.substr(0, 4);
with
std::string str1 = dayow.substr(0, 3);
std::string str2 = month.substr(0, 2);
std::string str3 = day.substr(0, 2);
std::string str4 = year.substr(0, 4);

Answer 3

change this part:
std::string str = dayow;
std::string str1 = str.substr(0, 3);
std::string str = month;
std::string str2 = str.substr(0, 2);
std::string str = day;
std::string str3 = str.substr(0, 2);
std::string str = year;
std::string str4 = str.substr(0, 4);
to:
std::string str = dayow;
std::string str1 = str.substr(0, 3);
std::string stra = month;
std::string str2 = stra.substr(0, 3);
std::string strb = day;
std::string str3 = strb.substr(0, 2);
std::string strc = year;
std::string str4 = strc.substr(0, 4);
problem was you had same variable name for day,month and year