writing to a file?

[chrisx16x2008]

i am trying to write test to a file im using ofstream outfile
("thefile.txt", ios::app && ios::out | ios::in);
outfile.open("thefile.txt");
outfile << "a";
outfile.close();

i get no compile errors at all when i type cout << it works fine but i can never get it to put "a'" into a file. i have been trying at this for 2 days someone please help me out.

[mischief]

you're opening the file twice, once in the constructor and once with the ofstream::open member. try fixing that

[chrisx16x2008]

ok so my new code. it writes to the file but everytime it opens it dumps the files. I was told a while back that ios::app was supposed to stop that by appended the contents to the new contents. Although as of right now its dumping the contents upon open.

Code: Select all

      
ofstream file;
file.open("test.txt", ios::app & ios::in | ios:: out);
if (file.is_open())
{
file << "a";
cout << "wrote to the file";
}
else
{
cout << "error reading file";
}
file.close();


[mischief]

i think you have a problem with your flags. i don't think using bitwise AND is the proper way to set the flags, as far as i know only bitwise OR is supposed to work.

also, why are you using ios::in on an output stream?

[chrisx16x2008]

yea i just realized i didnt need the ios::in but can u give me a website to learn about flags cuz i have no idea what they are.

[mischief]

try http://www.cplusplus.com/reference/iostream/ofstream/

[chrisx16x2008]

alright thanks alot for all your help mischief i got it working. All i had to do was use the | statement instead of the & and it worked.