Thanks AD. I'm in the process of coming to grips with all or most of the basic cin uses and I was more concerned with why an error state is recorded when there is a newline left in the input buffer...

I'm self studying C++ and I'm actually back-tracking a bit in order to clarify things. My question revolves around why in the following code is the cin.fail() == true.


#include <iostream>...

Good pick up. It appears that the variable ch needs to be checked prior to the switch statement. I've modified my original program that I posted at the top of this thread. What needed to be...

Thanks again. After posting this question, re-reading it, I sort of then realised that the missing argument had to be 'hardcoded' or be a 'string literal' at the definition. Probably the point of...

Thank you very much, this has certainly cleared things up. In a way, I'm glad I came across this problem, hopefully it won't catch me out again, when progressively compiling.

I'm self studying from the book, C++ Primer Plus Fifth Edition, by Stephen Prata. The following relates to Chapter 13, Page 699, Programming Exercise #4. One task is to write the derived class...

I'm self studying from the book, C++ Primer Plus Fifth Edition, by Stephen Prata. The following relates to Chapter 13, Page 699, Programming Exercise #4. One task is to write the derived class...

Oops straight back at ya.......lol

I think you mean when i is set to 6 it will fail, thus 5 iterations.

In relation to the original question, I would use a while loop with the test condition checking against the ever decreasing...

You still need to call your function from main(). In main, simply initialise and assign three double variables and pass them into your function.

In main() something like this cout << mpg(d1, d2,...

You need to at least write a main() program, that is the only way you will be able to test your mpg function.

What were the errors.

Try it in a program........see what happens....

Ok, here's the formula:

miles travelled / (size of tank - gallons left) = mpg.

mpg is miles per gallon.

miles : 1000
size (gallons) : 60
left (gallons) : 10
1000 / (60-10) = 20 mpg.

Ok, I can see where you are confused and I apologise accordingly. I re-read your initial first post and I skipped the bits about the information to be input being 1. size of tank, 2. gallons left...

miles / gallons = mpg

It's the same function, you haven't made any changes.

By the way, in the context of your function the variable 'numberofmilest' first needs to be initialised as a double.

Have you tested this...

Do you notice in your function that you are passing in three arguments. To work out miles per gallon, you only need two arguments (miles and gallons). Do the calculation in the function (using...

Think of it this way. You have two known pieces of information (gallons used and miles travelled), that is all you know. The third piece is what is calculated and is the purpose of the function -...

Thanks everyone, much appreciated.

Thanks all for responding, very much appreciated and it's certainly cleared the air for me. I've had to go back a chapter and re-read up on implied constructor conversions. I'm now left with this...

Hope someone can clarify. I'm self-studying and my question relates to Programming Exercise # 2, Chapter 12, C++ Primer Plus Fifth Edition (pg. 629). I completed the exercise and achieved the...

There is no need to initialise and declare the return value, in this case. It's returned directly without first assigning it to a variable. If you wanted to, you could initialise and assign to a...

What was the culprit?

I'll give you one thing, you've got more front than Myers (substitute 'Myers' for any major department store in your area) but maybe that's just me being cynical.

What type of program are you...

Thank you all. This is now resolved. I fell victim to not reading the question properly.

That is what I thought. To recap:

Move add(const Move &m) const;
// this function adds x of m to x of invoking object to get new x,
// adds y of m to y of invoking object to get new y,...

I'm learning C++ from C++ Primer Plus, 5th Edition, and have come across the following problem.

The following class declaration is given as part of the question:

/*
Name: move.h
...

I'm not really following the point of this thread. I can't see what the problem is. (other than a cranky professor) At the end of the day, you have to hand in your assignment and no doubt it's the...

It seems like this is an ambitious project or assignment for someone who doesn't understand the basics of classes. I would have thought your class (as in school) would have eased you into this and...

What did you do to resolve the problem?

eesti44 it appears we're working from the same book, C++ Primer Plus, 5th Edition, and at the same chapter doing the programming examples. I've just completed this particular exercise and it gave...

Thank you once again, I quickly added a blank int main() function and it compiled without error. I shouldn't forget this gotcha in future.

ps. I probably should have created a new thread for my...

Thank you, how did I not see that.

I'm now getting another compiler error indicating this [Linker error] undefined reference to `WinMain@16' .

From another editor, Programmers Notepad,...

Further, when I combine these two files into one file, for ease of compilation, I get the same compiler error message. So I suppose it's not related to a multiple file thing.

Hope someone can help. I'm self-studying from C++ Primer Plus, 5th Edition. I'm having trouble working out why the following two files will not compile. I'm using Dev-C++, under Windows Vista....

Check your for line, there's an additional semi-colon.

numbersuffix is not declared, consider including string or cstring headers (one or the other).

Not sure why window.h is included, it's...

At a glance I'd say that if the variable 'day' is evenly divisible by 5 then branch off to your 'theNextGeneration()' function.

Another way, which was also indicated was to increment day by 5 thus...

I'd guess that you should be able to determine if it's right or not and I'm suspecting you're guessing it's not.

I'd suggest removing the cout statements from the for loops of the assignment...

This works if you don't mind the newline right from the get go.

if (i % 10 == 0)
cout << endl;
cout << alpha[i] << "\t";