I know this question has been asked a million times before, but most of the questions are more complex than I need. I already know which lines will have what data, so I just want to load each line as its own variable.
For example, in "settings.txt":
800
600
32
And then, in the code, line 1 is set to int winwidth, line 2 is set to int winheight, and line 3 is set to int wincolor.
Sorry, I'm pretty new to I/O.
Possibly the simplest thing you can do is this:
std::ifstream settings("settings.txt");
int winwidth;
int winheight;
int wincolor;
settings >> winwidth;
settings >> winheight;
settings >> wincolor;
However this will not ensure that each variable is on a new line, and doesn't contain any error handling.
#include <iostream>
#include <fstream>
#include <string>
using std::cout;
using std::ifstream;
using std::string;
int main()
{
int winwidth,winheight,wincolor; // Declare your variables
winwidth = winheight = wincolor = 0; // Set them all to 0
string path = "filename.txt"; // Storing your filename in a string
ifstream fin; // Declaring an input stream object
fin.open(path); // Open the file
if(fin.is_open()) // If it opened successfully
{
fin >> winwidth >> winheight >> wincolor; // Read the values and
// store them in these variables
fin.close(); // Close the file
}
cout << winwidth << '\n';
cout << winheight << '\n';
cout << wincolor << '\n';
return 0;
}
ifstream can be used with the extraction operator >> in much the same way you use cin. Obviously there is a lot more to file I/O than this, but as requested, this is keeping it simple.
