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File Input/Output

Posted on 2000-04-21
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Last Modified: 2010-04-10
Hi. I have like 25 files with info on my machine. What I want to do is create a program that a person enters the name of a file and only that file would open and be read and its contents output.

for example some file names:

war.txt
clean.txt
america.txt
baseball.txt
republican.txt


I want the user to enter a name of a file. Lets say the user types war. I want to be able to read only the contenst of this file. Is there a way I can do this without having to do lost of switch statements or if statements?
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Question by:Mr_Wicked
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6 Comments
 
LVL 7

Expert Comment

by:KangaRoo
ID: 2738240
string the_name;
cout << "Give the file name"<<endl;
cin >> the_name

fistream thefile(the_name.c_str());
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LVL 7

Expert Comment

by:KangaRoo
ID: 2738246
Sorry, it's ifstream and not fistream
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Author Comment

by:Mr_Wicked
ID: 2738289
It will open a file with what extension?
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Author Comment

by:Mr_Wicked
ID: 2738300
Can you explain the code you posted?
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LVL 7

Accepted Solution

by:
KangaRoo earned 240 total points
ID: 2738751
It's just brief, if you don't want the user to type the extension

#include<string> // for the string class
#inlcude<fstream> // for file streams

// ....

string the_name;  // string class

// ask the user for the filename
//
cout << "Give the file name"<<endl;
cin >> the_name

// append the extension
//
the_name += string(".txt");

// open the filestream for reading
//
ifstream thefile(the_name.c_str());
// ifstream constructor takes a null terminated c string, which is obtained
// from the_name by it's member function c_str()
0
 

Author Comment

by:Mr_Wicked
ID: 2738946
i'll check if this works
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