Strcmp - Reading from File (Can't read?) - Beginner

I created a program for fun which its for Halloween. I wasn't able to get it working as comparing strings from text file (its in Choice 2 - if statement). It only returned 0.00 instead of outputting the total running sales of Candy, Decorations, and Costumes. I'm not sure where I went wrong here.

Doing so by entering sales (choice 1) first which that'll create the file and appending the sales to the file. Then run the program again to enter the menu choice 2 of tallying the sales for the day. As you can see, it only reflect the 0.00 instead of 139.99 (for example).

So, I'm assuming it can't read from the text file or something. Hope I'm clear... I'm using g++ compiler to run the program. :)

Code:

---

edit: remove code - personal reason

---

You're opening the file for output in the case where you're trying to read.

Ive tried to remove the code down below in choice 2.

Code:

---

dataFile.open("sales.txt", ios::out | ios::app);

---

It did the same thing to 0.00. What should it be changed to?

Just use an input stream:

ifstream datafile;
datafile.open("sales.txt");

There is a similar stream for output, named ofstream. fstream is a bidirectional stream, and something that I honestly never had use for.

Quote:

---

Originally Posted by whiteflags

Just use an input stream:

ifstream datafile;
datafile.open("sales.txt");

There is a similar stream for output, named ofstream. fstream is a bidirectional stream, and something that I honestly never had use for.

---

hmm.. I changed that and now it said no match for 'operator<<' in dataFile' ...

You can't write to an input file. ios::out --> ofstream.

Quote:

---

Originally Posted by tabstop

You can't write to an input file. ios::out --> ofstream.

---

did change to ofstream dataFile; and to dataFile.open("sales.txt", ios::out);

which that created error again I mentioned above:

119: error: no match for 'operator>>' in 'dataFile >> line'
121: error: no match for 'operator>>' in 'dataFile >> totalCost'

nevermind... I figured it out. Thanks for the help! :)