🔒 Locked

C++ File management help

Started by 3dburns Nov 16, 2004 at 11:30 PM 3 replies 950+ views

Original Post

Nov 16, 2004 at 11:30 PM

I'm writing a baseball game and I'm trying to manage the teams by having all the teams and their players in separate files. What I need to do is load the right file according to what team the player picks. For example if a player picks the Cubs, my program needs to automatically load C:/Teams/Cubs.txt. Same thing with the Astros , C:/Teams/Astros.txt. I thought that I could just pass a string of the teamd and create a string with the file name from that but when I try to load a istream I get an error. I'm assuming that an istream declaration can't have a string. Can anyone else think of a better way to load a corresponding according to what team the player picks?? Thanks

stormrunner

Nov 16, 2004 at 11:45 PM

well, have you tried :

#include <iostream>#include <fstream>#include <string>void LoadTeamFile(std::string teamname){   // concatenate the ".txt" extension   // to the teamname - assuming teamname   // is in correct format   teamname += ".txt";   // open an ifstream   // you must use teamname.c_str() -    // ifstream only accepts char* s as   // args   std::ifstream teamFile(teamname.c_str());   // while not end of file   while(!teamFile.eof())   {      // read in data      // and assign it to some      // data structure   }}int main(int argc, char** argv){   std::string team;   std::cout << "Choose your team name : ";   std::cin >> team;   std::cout << endl;   LoadTeamFile(team);   // continue with program   return 0;}

as to where the file is stored (C:\Teams\ect) you can use a global or something for that.
cheers.

JWalsh

Nov 16, 2004 at 11:46 PM

3dburns,

I'm not fully understanding what you're trying to do, perhaps you can post some code?

If you're trying to do what I think, the idea is solid. Just obtain the team name from the user, then form a string by concatenating the prefix + teamName + fileExtension.

For easier use of string manipulation, use std::string. You can use the std::string::c_str() function to return a const char* when you want to open the file. Here's some Pseudo-code

std::string teamName;// Get team name from user...std::string prefix = "C:/Teams/";std::string extension = ".txt";std::string fileName = prefix + teamName + extension;// Now open the file with the new namestd::ifstream file( teamName.c_str() );

This is just pseudo-code, but should give a you clear idea of what I'm saying. If I'm missing your question, please feel free to post some clarification code.

GameDev135

Nov 16, 2004 at 11:48 PM

You should be able to just load a file based on a string name.....
For example....

#include <fstream>#include <iostream>int main(int argc, char* argv[]) {   int x;    char *p = "textfile.txt";    ifstream f;    f.open(p);     f >> x;    f.close();   cout << x << endl; // prints the first number in textfile.txt   return 0;}

3dburns

Nov 17, 2004 at 12:09 AM

[edit] Thanks that fixed it

Topic Locked

This topic has been locked by a moderator. New replies are not allowed.