can you help me figure this out?

This is a discussion on can you help me figure this out? within the C++ Programming forums, part of the General Programming Boards category; I'm a new programmer, I just was curious and wanted to write some code that would compare two .txt files ...

  1. #1
    Registered User
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    Jan 2009
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    Staten Island New York
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    Post can you help me figure this out?

    I'm a new programmer, I just was curious and wanted to write some code that would compare two .txt files char by char and check if they are identicle.
    this is the code that I wrote, Can someone help me figure out why it doesn't work?
    The compiler i'm using is microsoft visual C++ ver.6.0
    my compiler shows 0 errors 0 warnings, but the .exe crashes
    Code:
    // alfred J. Denigris
    // write a program that tests if two text files are identicle.
    // 1_27_2009
    
    #include <iostream>
    #include <fstream>
    using namespace std;
    
    ifstream getA;
    ifstream getB;
    
    bool test(char a, char b);
    
    int main()
    {
    
    int num=0;
    char chA, chB;
    
    ifstream getA;
    ifstream getB;
    
    getA.open("fileA.txt");
    getB.open("fileB.txt");
    
    
    
    while (!getA.eof() || !getB.eof())
    {
    
    	getA.get(chA);
    	getB.get(chB);
    
    
    	if (test(chA, chB) == true)
    		cout <<" char number "<<num<<"  is "<< chA << "for file a and "<< chB << "  For file b.  TRUE" <<endl;
    		else
    		cout <<" char number "<<num<<"  is "<< chA << "for file a and "<< chB << "  For file b.  FALSE" <<endl;
    	
    num++;
    }
    	
    	
    
    getA.close();
    getB.close();
    	cout << "end";
    	return 0;
    }
    
    
    	bool test(char a, char b)
    	{	if(a==b)
    	return true;
    	else 
    		return false;	}

  2. #2
    C++ Witch laserlight's Avatar
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    I suggest that you start by writing a program that reads a file and prints its contents. A few things to note while you are at it:
    • Avoid the use of global variables.
    • Indent your code consistently.
    • Do not use eof() to control the loop.
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    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  3. #3
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    Staten Island New York
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    Found the problem

    well, besides the obvious problem of declaring the ifstream variables twice, once globaly and another time local to main. I found out the problem after reading your reply.

    The problem was that...

    are you ready for this??

    I wrote the entire thing on my 16 GB made in Hong Kong jump drive, which i now declare to be worthless.

    The data was never there to begin with and was crashing for reasons relating to that.

    Luckily i posted this code into the forum and after i restarted my computer( and lost that bit of code that i was writting) I was able to retrieve it from this forum.

    Therefore... Thank you Cprogramming.com for the ability of this forum service and your members for helping me to "solve this problem"

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