I'd be betting on your side. But that just means he then needs to define the criterion for "The most efficient". For example, does it mean "fastest", "smallest number of machine instructions",...

You're developing a realtime application, and don't know how to add values to elements of an array?????

Pull my other leg: it'll play a tune for you.

What is the criterion by which you would...

An explicit conversion is what you're calling a cast. An implicit conversion is a conversion between types that the compiler allows or performs, even if you don't do a cast. For example;

...

As a general rule, yes you should.

An implicit conversion exists between int and size_t so, in rough terms, you shouldn't need an explicit conversion between them.

Note "explicit conversion" is...

Try this. Comments added explaining the reason for change from your code.

#include <iostream> // <iostream> is standard, <iostream.h> is not
#include <cstring> // need functions to...

If the content of header A relies on content of header B, then it is generally a good idea for header A to #include header B. Examples of "relies on" are;

- header B declares a base class, and...

You need to understand the difference between registering a callback function and actually calling it.

Setting TButton's OnClick event egisters a function that will be called when the user -...

TButton's constructor needs to be passed a pointer to a TComponent (eg a parent form) that is responsible for managing the button.

It is also necessary to set various attributes: position,...

The only way in which a constructor can report an error is by throwing an exception.

The C++ standard has this to say (in Section 15.2 "Constructors and destructors" which is within Section 15...

That statement is inaccurate on so many levels that I'm speechless. Non-virtual functions can also be overridden, but the behaviour differs from overridden virtual functions due to "name hiding", as...

In an ideal world, where compiler vendors care about perfectly diagnosing all errors in code, yes. In the real world, where compiler vendors prefer to focus attention on other things (eg...

It is necessary for the derived class to override all inherited pure virtual functions, otherwise the derived class remains an abstract class.

Provide a small but complete example of code that exhibits your problem.

Your code sample and description is not complete, and the cause of the error is probably in something you haven't shown or...

Your problem is actually the first four lines of the main() function. I've added comments to the code that are related to problems on each line.

void main() // main should return int, not...

The C++ standard explicitly allows compilers to eliminate temporary objects if the only way of detecting if those temporary objects exist is to track constructor and destructor calls.

A special...

Your main.cpp needs to have visibility of the definition of the conversion (or cast) operator. In other words, the implementation of the operator needs to be inlined into the vector.h: otherwise...

You are making the mistake of assuming that integer division yields a floating point result - it doesn't: it yields an integer result and integers can't represent fractions.

In your code i/2231...

If there are common things that all classes which handle triangles have to do, put those functions into their own class (eg TriangleModelFile derived from ModelFile). Derive the specific/multiple...

Don't use the first option. The whole point of a Base class is capturing functionality that is common to all derived classes.

As to the second option, there are many ways. Such as....
...

Your function highestTest() does not initialise the variable "highest", but the first operation involves comparing its value with elements of the array. That means the value it ends up with in...

When you append pointers onto a vector of char, the pointer is copied. You are expecting the data the pointer points at to be copied.

With a vector<char *> you need to explicitly copy the data...

Well, I could. But that takes the challenge of problem solving away from you.

Look back in my previous posts in this thread for definition of T, n, etc.

VernonDozier has worked out what I'm...

Start with T(0) = 1.

In a loop use the fact that T(n+1) = x*T(n)/(n+1) to compute each term. Add the terms together.

Oh, please! Huge integer libraries or strings are needed for some things, but falling back on them for basic problems like this is crazy.

The program can go to much higher terms simply using the...

No .... you mean your tests did not detect a problem. Your tests will only check things you think to test. If you didn't anticipate the particular problem that is occurring, a fault will get...

The cause of your problem is almost certainly code executed before your red lines are reached.

My guess - although you haven't shown them - is that the problems really occur in your input()...

Not even close.

You have declared myclass's length() method as taking one argument, and yourlen() calls it with two arguments.

Similarly, yourlen() is declared with no arguments, but when you...

In C++, recursive call of main is not allowed at all.

To answer the original question, if you must be able to execute a program that reads from standard input and writes to standard output, you...

Try closing outputfile before attempting to open it as an input file.

Dragon's approach will work .... the only other obstacle is the fact that most systems allow a process to have only a small number of files open simultaneously. If you exceed that number, .....