Reading new lines in a file

For some reason new lines are disregarded when I output the contents of "map.dat". Take a look:

Code:

---

#include <iostream>
#include <fstream>
#include <windows.h>
using namespace std;

int main()
{
        HANDLE hOutput = GetStdHandle(STD_OUTPUT_HANDLE);

        ofstream fout;
        ifstream fin;

        char map;

        fout.open("map.dat");

        fout << "!@#\n";
        fout << "#@!\n";

        fout.close();

        fin.open("map.dat");

        while(fin>>map)
        {
                switch(map)
                {
                case '!':
                        SetConsoleTextAttribute(hOutput, FOREGROUND_INTENSITY | FOREGROUND_RED);
                        break;
                case '@':
                        SetConsoleTextAttribute(hOutput, FOREGROUND_INTENSITY | FOREGROUND_GREEN);
                        break;
                case '#':
                        SetConsoleTextAttribute(hOutput, FOREGROUND_INTENSITY | FOREGROUND_BLUE);
                        break;
                }

                cout << map;
        }

        fin.close();

        SetConsoleTextAttribute(hOutput, FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE);

        cout << endl;

        return 0;
}

---

Any solutions?

hmm
very strange...even doing this doesn't help:

Code:

---

#include <iostream>
#include <fstream>
#include <windows.h>
using namespace std;

int main()
{
        HANDLE hOutput = GetStdHandle(STD_OUTPUT_HANDLE);

        ofstream fout;
        ifstream fin;

        char map;

        fout.open("map.dat");

        fout << "!@#\n";
        fout << "#@!\n";

        fout.close();

        fin.open("map.dat");

        while(fin>>map)
        {
                switch(map)
                {
                case '!':
                        SetConsoleTextAttribute(hOutput, FOREGROUND_INTENSITY | FOREGROUND_RED);
                        break;
                case '@':
                        SetConsoleTextAttribute(hOutput, FOREGROUND_INTENSITY | FOREGROUND_GREEN);
                        break;
                case '#':
                        SetConsoleTextAttribute(hOutput, FOREGROUND_INTENSITY | FOREGROUND_BLUE);
                        break;
                case '\n':
                        cout<<endl;
                        break;
                }

                cout << map;
        }

        fin.close();

        SetConsoleTextAttribute(hOutput, FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE);

        cout << endl;

        return 0;
}

---

strange indeed :(

use binary i/o with read and write and see what happens.

binary i/o? Please explain!

[snippet]

Code:

---

ofstream file("file.dat",ios::binary)
if (!file) {// deal with file cant be opened here}
//so if we get here file opened
// lets make an object and save to disk
MyObject(Param1,Param2,Param3);
// object made now lets write to disk with member function write
file.write( reinterpret_cast<const char*>(&MyObject),sizeof(MyObject));
// The cast just casts the address of our object (MyObject*) to a const char*. sizeof returns the number of bytes in our object and a char is 1 byte. thats why cast needed.
// now you look up ifstream::read which can read our data back from disk to memory.

---

[/snippet]

i'm not sure...but i think it has to do with how he's reading in the file, not neccessarily in what format...it has to do with his while loop im' sure of that, i've been able to do a case default and replace the \n characters with another character...then the breaks are spit out...but i couldn't use \b's to overwrite the letters that were spit out.

maybe its because you are using operator >> which leaves newline in stream and discards trailing newline on next read.

hmm
lets try to rethink this shall we?

Code:

---

#include <iostream>
#include <fstream>
#include <windows.h>
using namespace std;

int main()
{
        HANDLE hOutput = GetStdHandle(STD_OUTPUT_HANDLE);

        ofstream fout;
        ifstream fin;

        char map[100];

        fout.open("map.dat");

        fout << "!@#\n";
        fout << "#@!\n";

        fout.close();

        fin.open("map.dat");

        fin>>map;
                for (int i=0;i<sizeof(map);i++)
        {
                switch(map[i])
                {
                case '!':
                        SetConsoleTextAttribute(hOutput, FOREGROUND_INTENSITY | FOREGROUND_RED);
                                                cout<<map[i];
                        break;
                case '@':
                        SetConsoleTextAttribute(hOutput, FOREGROUND_INTENSITY | FOREGROUND_GREEN);
                                                cout<<map[i];
                        break;
                case '#':
                        SetConsoleTextAttribute(hOutput, FOREGROUND_INTENSITY | FOREGROUND_BLUE);
                                                cout<<map[i];
                        break;
                                default:
                                                cout<<map[i];
                                                break;
                }

       
        }

        fin.close();

        SetConsoleTextAttribute(hOutput, FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE);

        cout << endl;

        return 0;
}

---

let me know how that works out for ya, i haven't tested it yet

Ahh, with that code only the first three characters show up :mad:

use one of the get() member function variants to read in every char, even white space such as new line char. >> will ignore all whitespace and getline() must have a terminating char of some sort so that char won't appear in map. If you want ALL char in file to appear in map, use a get()

Code:

---

char ch;
int i = 0;
//fin>>map;
fin.get(ch);//read in first char
while (!fin.eof())//whlie most recent char read in isn't EOF
{
  map[i++] = ch;//store current char in map
  fin.get(ch);//read in all char one at a time from file
}
map[i] = '\0';//make map a string, not just a char array

//beware! sizeof gives the capacity of map, NOT the actual number of char in map!  If map isn't exactly 100 char long you will end up reading an "empty section" of the array with the switch statement.  I would use strlen() instead.

for ( i=0;i<sizeof(map);i++)
{
  switch(map[i])

---

lol, I got it to work! Thanks!