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Output to high scores txt file not as expected

curious noob (18)
The code at the bottom is a program to update a txt file with high scores. If I continually update with a new highest or lowest score, there doesn't seem to be any problems. If I enter a number to be inserted between two others, I get unexpected results.

For example, if I enter scores 100,12,7,55, the txt reads:

1
2
3
4
5
6
 
100

55
12
7


If I enter scores 100,12,7,5,55, I get:

1
2
3
4
5
6
7
 
100
1
55
2
7
5


If I enter scores 4,5,66,100, exit the program, reopen program and enter 100,200, I get:

1
2
3
4
5
6
7
 
200
100
66
100
5
4


If I open the txt, delete everything, press enter 10 times, close and save txt, open program and enter scores 100,12,7,55, I get:

1
2
3
4
5
6
7
8
9
 
100




55
12
7


Full code:

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#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

int main()
{
    fstream scoreWriter( "highscores.txt", ios::in | ios::out );
    if( ! scoreWriter.is_open() ){ cout << "error, file not open"; return 0; }
    int newScore = 0;
    int curScore = 0;
    cout << "Enter new high score: ";
    cin >> newScore;
    while( newScore != 0 )
    {
        scoreWriter.seekg( ios_base::beg );
        streampos preCurScorePos = scoreWriter.tellg();
        while( scoreWriter >> curScore )
        {
            if( curScore < newScore )
            {
                break;
            }
            else
            {
                preCurScorePos = scoreWriter.tellg();
            }
        }
        if( scoreWriter.fail() && !scoreWriter.eof() )
        {
            cout << "\nFail err, not caused by eof."; return 0;
        }
        if( scoreWriter.eof() ) { scoreWriter.clear() ;}
        vector<int> lesserScores;
        scoreWriter.seekg( preCurScorePos );
        while( scoreWriter >> curScore )
        {
            lesserScores.push_back( curScore );
        }
        if( !scoreWriter.eof() ){cout << "\nErr, this should be eof"; return 0; }
        scoreWriter.clear();
        scoreWriter.seekp( preCurScorePos );
        if( preCurScorePos != 0 ){ scoreWriter << endl; }
        scoreWriter << newScore << endl;
        for( vector<int>::iterator itr = lesserScores.begin(),
                end = lesserScores.end(); itr != end; itr++ )
        {
            scoreWriter << *itr << endl;
        }
        cout << "Enter new high score, or 0 to exit: ";
        cin >> newScore;
    }
    return 0;
}
curious noob (18)
Might have found another piece of the puzzle. It works in VS2013 if I add (short) to line 44, so it reads:

 
 
if( (short)preCurScorePos != 0 ){ scoreWriter << endl; }


VS wouldn't even let me run the program without editing that line. Still doesn't work in codeblocks regardless of adding (short). I'm using codeblocks 13.12 with minGW 4.8.1.
Last edited on
curious noob (18)
Last edited on
curious noob (18)
Also looks relevant: http://stackoverflow.com/questions/25413243/seekg-not-working-as-expected

Still can't get my program to work in codeblocks though.
Last edited on
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