hello,
Here is my question.
Is it possible to go from char to operator.

char a='+';
//code to switch from char to operator
int b,c=3,d=5;
b=c a d;

Not easily with C++. You're best bet is to do a bunch of if statements, so:

And a switch statement would be neater.

GF

I was thinking about implementing a massive switch statement, but I guess the problem goes a little deeper.
I would like to read in equations from a text file and be able to execute them. The equations would be variable and the inputs would be variable.
I guess I am looking for a formula builder.

This is exactly my second C++ programming assignment

Which is kinda good & bad news.

This is not an easy problem - you'd think it is - but it takes a good bit of work! (I know, I was surprised too).

A simple equation "12 / 6" won't be hard to code for, but how about "12 / 3 * 2" And then the dreaded "2 + 12 / 3" What operator first? (They all give you 6, By the way).

Take that last equation. Consider a simple parser which will step along the string, chunk (number or operator) by chunk at a time.

It'll see 2. Plus sign. 12. Then it'll execute it 2 + 12 =14. Then a division sign. 3. 14/3 = 4.6666... - Not correct!

Maybe brackets will help? They will, but it makes the coding tougher.

Try some ideas! Have you a lecturer, or are you learning this yourself. This is a tough exercise, but I'll try to help as best I can!

GF