Creating a file with current date and time in C++ - c++

Question

I have written this code to make a file with current date. It is working 100 percent fine but is this approach right? or is this solution optimum? Can anyone help me to come up with better solution if required?
What I have done here in this code.
Firstly I wrote date in a file named name.txt.
Then I read that file using getline function and stored in string variable s.(I used getline to make date in a single string)
Then I removed name.txt, because now it is useless.
Now I made a new file using c_style string s.c_str() and wrote something in file.( Note: s is a string variable containing date. )
Finally, I opened that file using s.c_str() to read the data in file.
#include <ctime>
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
//SHAKAS ULTIMATE CODE
int main()
{
string s;
time_t now = time(0);
tm *ltm = localtime(&now);
ofstream file;
file.open("name.txt");
if(file.is_open())
{
file<< ltm->tm_mday<<"-";
file<<1 + ltm->tm_mon<<"-";
file<<1900 + ltm->tm_year;
//file<<1 + ltm->tm_hour<<"_"; Uncomment it if you want hours/min/sec on the name of file
//file<<1 + ltm->tm_min<<"_";
//file<<1 + ltm->tm_sec;
}
else
cout<<"Unable to create file";
file.close();
ifstream i;
i.open("name.txt");
while(!i.eof())
{
getline(i, s);
}
i.close();
remove("name.txt");
ofstream fileC;
fileC.open(s.c_str()); //writing in file, just to check
fileC << "WHO IS THE BOSS...?";
fileC.close();
string a;
i.open(s.c_str());
while(!i.eof())
{
getline(i, a); //Opening that file again to check if its written
cout<<a;
}
i.close();
}