How can I tell the program to stop using freopen

Question

I am beginner in C++ and I have a question that is beyond my limits. I compile under GNU GCC. I use

#include

also known as:

Answer 1

In windows,

freopen("CON","r",stdin);

this code worked for me. It switches the stdin to console.
P.S: The text file used to take input before this, must be ended with a newline.