Asking for Filename from user!

[Leon23]

Hey guys! I wanted some help on filenaming! I wanted the user to input the filename. Also if he could also input the file extension, it would be good. Mostly, I need the text file.
Please write your codes in C++. Any help would be appreciated. Thanks! :)

  #include <iostream>
#include <string>
#include <fstream>
using namespace std;

int main()
{
    string date;
    cout<<"Enter date: ";
    getline(cin,date);
    cout<<endl;
    string title;
    cout<<"Enter note title: ";
    getline(cin,title);
    cout<<endl;
    string note;
    cout<<"Enter note: ";
    getline(cin,note);

    ofstream diary;
    diary.open("date.txt",ios::out);
    if (!diary)
        cout<<"Error opening file!";
    else
    {
        diary<<date<<"\n\n"<<title<<"\n"<<note;
    }
    return 0;
}

[Peter87]

Read the filename as you have done with the other strings and pass it to the open function.

[Leon23]

Didn't get your point! Can you elaborate it please? Thanks!

[AbstractionAnon]

The open on line 21 takes char array as it's first argument.

Simply prompt the use for a filename.
Read it into a char array, then pass the char array to open instead of the quoted literal.

[MiiNiPaa]

The open on line 21 takes char array as it's first argument.

Use C++11 compiler and use std::string without need to use unsafe c-strings ever again.

std::cout << "Enter name of file to open: ";
std::string filename;
std::getline(std::cin, filename);
ofstream diary;
diary.open(filename, ios::out);// or filename.c_str() if you have old compiler 

[Leon23]

Do you mean something like this?

char file[50];
cout<<"Enter filename: ";
cin>>file;

ofstream diary;
diary.open(file);

[Leon23]

@MiiNiPaa, the code you suggested gave some huge errors! :(

[MiiNiPaa]

Post exact error here. Did you try to use filename.c_str() an suggested in comment?
What compiler do you use?

[Leon23]

This was the error!

error: no matching function for call to 'std::basic_ofstream<char>::open(std::string&, const openmode&)'|

And I use CodeBlock.

[Leon23]

Okay the .c_str() thing worked!! Thanks a lot! Now I am facing a new probelm! It just creates a file with that name! I want it to be a text file! What do I do? Thanks again!!

[MiiNiPaa]

ios::out presumes that it should overwrite this file.
Either use ios::app or ios::out|ios:ate (if you want to use seekg())

Select settings → Compiler and debugger → in compiler flags set "Have g++ follow upcoming C++0x ISO..."
And after that first example will work too.

[Leon23]

Thanks! That worked too! :D
I know this is going somewhere else but can you tell me how to use system's date and time so that I won't have to ask for it from the user?

[MiiNiPaa]

http://en.cppreference.com/w/cpp/chrono
Look at the example here
http://www.cplusplus.com/reference/chrono/time_point/time_point/
or here