Sorry for my beginner question, but since the course never covered this, how do I create a c++ code that have a variable that takes input from a txt file on my computer? Say I created a int named number, how do I set it to a specific value in existing txt file? And how do I make the code automatically update the txt file if “number” were to change? Thank you
You read input by ifstream and output by ofstream. The example and link that I given should be enough self-explanatory.
If you want to add integers or something like that you have to do a type-casting with stoi.
I’m pretty sure no coding language available offers automatic file updating corresponding to variable (Correct me if I’m incorrect ty) since it is extremely resource-consuming. You have to do the file I/O everytime you have updates on variable.