Make a program that can write advice to a file. Your program should not require a data file to be present when it is run. If a file needs to be created, your program should do so.

According to ANSI standards, all compilers should operate the same way. Naturally they do not. David Busch one of my Spring 2011 students, managed to come up with code that worked with both MSVC++ and DevC++.

In MSVC++ his code:

inStream.open("advice.txt");

When no file is present, passes the test:

// Does this file exist?

if (!inStream.fail()) // file exists...

Because MS has decided to create a file if none exists. I believe this is not ANSI standard but is more convenient for a programmer.

For DevC++, his code:

if (!inStream.fail()){ // file exists

here is code to read in the orginal advice. Of course in MSVC++ the file is empty.

}

else{ // This file does NOT exist.

inStream.close(); // close the input file stream

inOutStream.open("advice.txt", ios::in | ios::out | ios::trunc); // create new file

}

Handles the case where no file exists and one must be created. I suggest using this approach since it is compiler independent.

Important: Note that there are 3 types of file streams, an ofstream only does output, an ifstream only does input. If you want input and output on the same file you use an fstream. inStream.open("advice.txt",ios::app); will always cause an error if you declared ifstream inStream; Unfortunately, it will compile but will always fail at run time because you are trying to append to an input stream.

Example Output:

First Run (Dev C++):

Could not open Advice File.

Assumption: first run - creating a new file...

Enter your phrase for the next user:

Never take advice from a programmer.

Press any key to continue . . .

Second Run(Dev C++)

Found Advice File.

Old Advice:

Never take advice from a programmer.

Enter your phrase for the next user:

Ok I never will! Ooops, I just did.

Press any key to continue . . .

I do have code but there are some errors that I can't fix. Here is the code:

#include #include #include using namespace std; int main() { //declaring a string variable for input and output string str; //opening the file fstream inStream("advice.txt"); //if file exists if(!inStream.fail()) { cout<<"Found Advice File."<

ERRORS I GET:

cannot open source file "bits/stdc++.h" identifier "getline" is undefined identifier "getline" is undefined Cannot open include file: 'bits/stdc++.h': No such file or directory