ofstream file;
int noob=50;
file.open("thingy.dat");
file << "NOOB: " << endl;
file << noob << endl;
ifstream file;
int noob;
file.open("thingy.dat");
file >> noob;
Another .dat question
Author
Howdy,
OK, I am doing this to write to a .dat file:
Then I open the .dat file with NOTEPAD and edit the "noob" variable to 100. How do I then read/extract the "noob" variable? I tried this but it doesn't work:
That code doesn't read the "noob" variable. Which brings me to my main question. How do I read the "noob" variable if it comes after a string "NOOB: "?
[Edited by - Acid rain on April 7, 2007 6:50:55 PM]
You need to open the file first:
ifstream file;int noob;file.open("thingy.dat");file >> noob;
You write two things to the file (the string "NOOB: " and then an integer) but you only try to extract one thing, the integer. You have to read in the text first to reach the integer value.
#include <string>#include <fstream>void f(){ std::ifstream is("whatever.dat"); std::string s; int noob; is >> s >> noob;}
Author
Quote:Original post by EasilyConfused#include <string>#include <fstream>void f(){ std::ifstream is("whatever.dat"); std::string s; int noob; is >> s >> noob;}
Thanks!
int num;
std::string text;
file >> text >> num;
the >> operator will read in a string from the file, which is "NOOB:", and then the >> operator will read in an integer and store it in num.
EDIT: you asked for explanation then took it back! :P
std::string text;
file >> text >> num;
the >> operator will read in a string from the file, which is "NOOB:", and then the >> operator will read in an integer and store it in num.
EDIT: you asked for explanation then took it back! :P
Quote:Original post by Nvii
also, should close the file when your done
file.close();
You don't need to do this as the destructor for fstream objects closes files automatically.
Btw, if the .dat thing is throwing you off.. you could name it .txt, .lol, .iamsocool, .wooooooo or anything you'd like. We'll, I'm sure there are some limits/exceptionms, but you get what I'm saying.
This topic is closed to new replies.
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