Problem with getline C++

[at pradeep]

I am having following code for reading and writing from an file....
but when i directly read from file... it displays all the data..
but when i do some write and the again read then it does not read any thing..
getline returns without reading anything...
and then file reaches to eof...

int main()
{
fstream tempFile;
tempFile.open( "abc.txt" );

if( !tempFile.is_open() )
{
printf("ERROR: Enable to Open File ");
exit(0);
}

printf("Writting To file\n");
string buffer = "I am in File";
tempFile.write ( buffer.c_str(), buffer.size( ) );
tempFile.write ( "\n", 1 );

printf("Reading From file\n");
string tempBuf;
while( !tempFile.eof( ) )
{
getline( tempFile, tempBuf, '\n' );
printf("Data %s\n", tempBuf.c_str() );
tempBuf.clear();
}


return 0;
}


whats the problem am i missing any thing...
please HELP!

[jsmith]

You have to reset the file pointer to the beginning of the file before attempting to read it.

[at pradeep]

for that should i use seekg or seekp i am confused in using both.

[Faldrax]

See http://www.cplusplus.com/doc/tutorial/files.html for info on using file I/O.
seekp() and seekg() are about 2/3 the way down.