How do I insert into string into myfile.open?

[TheTruePotatoDuck]

So I am making a program that allows someone to make their own text file so I wanted to insert a string into this piece of code

  myfile.open(".txt");

I tried myfile.open( name + ".txt"); but that doesn't work, Here is the full section of the code and any help is appreciated !

cout << "Creating File!" << endl;
			if (yu == 1) {
				ofstream myfile;
				ofstream myfile;
				myfile.open(name + ".txt");
				myfile << "Apples are great!.\n";
				myfile.close();

Ignore the yu and Apples are great that's just some test stuff

[Chervil]

I tried myfile.open( name + ".txt");

So long as you use an up-to-date compiler and enable C++11 that should work.

#include <iostream>
#include <fstream>

using namespace std;

int main() 
{
    string name = "banana";
    cout << "Creating File!" << endl;
    ofstream myfile(name + ".txt");
    myfile << "Apples are great!\n";
	
    return 0;
}

Older compilers may expect a C-string as the filename.
For example, ofstream myfile((name + ".txt").c_str());