Exporting data to *.txt

[leoNM]

Good Night
I'm a beginner in programing for numerical methods (CFD) I'm trying to export a bunch of data to notepad. The simplification of the problem would be an for loop that writes the numbers to a notepad archive, not to the prompt. How can I do it ?

  #include <iostream>
using namespace std;
 
int main ()
{
   //the for loop
   for( int a = 10; a < 20; a = a + 1 )
   {
       cout << "value of a: " << a << endl; // I want cout data in a notepad
   }
 
   return 0;
}

thanks !!

[Zhuge]

This should have exactly what you want:
http://www.cplusplus.com/doc/tutorial/files/

[leoNM]

Thank you !!