Objects in C++ can't change their type. You can have a variable of some pointer-to-animal type and then assign a new pointer-to-animal to that variable though.

Just remove a letter from the first string, print that letter, and do a recursive call. Of course, you'll want to do this for each letter.

Your problem is that you're writing very complicated and redundant code and thus it's hard to think about what your code is doing. Use a simpler algorithm to find and remove the largest and smallest...

It doesn't matter. Do what you enjoy. It's not like it's hard to learn a new language later. Realize that you'll have to mostly teach yourself C++ if you really want to learn it, because your...

http://lmgtfy.com/?q=sql

No, next_permutation won't work because his desired output is out of order :)

Hope this helps :)

#include <stdio.h>
int main(void) {
puts("123");
puts("132");
puts("213");
...

The U means that it's an unsigned integer literal. size_t is an unsigned integer type that's guaranteed to be able to hold the size of an array. But not a std::string. If you're paranoid you...

Is your call to .length() getting called every time or are you assuming that will get optimized away?

Don't use any globals (i.e. static variables) and have your function that calculates the answer be separate from the function that prints the answer.

Uh, I meant double tsurface = tsurfaceFUNCTION(radius, height, PI); of course.

Your syntax is invalid. You're using the syntax for declaring a function, when you should be using the syntax for calling a function:

double tsurface = tsurfaceFUNCTION(radius, height, double...

Huh? I didn't insert any tags.

I was asking a yes or no question, and a simple "no" would have sufficed :P

What? Are you mentally retarded?

Just use vector<>. Never use arrays. I mean, sure, at some point in time, you'll want to learn how to use them. They are useful for implementing vectors, after all. And sometimes, occasionally,...

atoi(text[0]) will not work because atoi expects a char*, not a char. That half of NeoKyrgyz's answer was basically useless and dumb.

If you want to convert the character "c" representing the...

Try figuring it out yourself. Then maybe you'll learn something.

Why don't you keep track of how many values the user has entered, and use some mechanism to see if that number's 10?

What? Why did you suddenly start using C?

Do you understand how arrays work?

If I were you, I would regard each of your details, 1, 2, and 4, as an individual problem to write a function for. Then the program is a simple combination of these functions, meeting detail 3.

You could start with a function that gets the input from the user.

You want to calculate the n-term series and not the infinite series?

What help do you need?

Your "line equation" is wrong -- you have defined a point.

In that case, the right solution would still be to use the closed form expression :)

Well it's almost like the series for exp(x), except the signs are alternating and it's missing the x^1 term and the x^0 term has the wrong sign. If consider the series you get for exp(-x), you...

I assumed you would have no problem spotting the errors, but alas, some are still unnoticed.

You need some way to convert strings to ints. One way is to use a stringstream, another way, after verifying that all characters of the string are digits and that there is one or more of them, is to...

You have errors.

It is so polymorphism. The derived class can override the base class's behavior in other ways than just virtual functions.

What are you asking? Are you confused about the operational semantics of C++, or are you asking about terminology?

You want a struct with a double and a bool.

You should never use inheritance except as a mechanism for polymorphism -- one reason being that 'putting stuff into structs' or classes (a.k.a....

I typed up a long reply to you before but decided to save it. One thing I think that is horrible with your notation is your use of functions like isnz, ife, etc etc. Ultimately they're insufficient...

Oh, it's just looking for a main function to run.

http://codepad.org/teq2fuVp

It seems to work fine. You have an implementation of Vector, right?

No, the answer is not that you're designing anything wrong. There is nothing wrong at all about mutually recursive data datatype definitions. There are inconveniences involved with circular data...

Figure it out yourself.

Just by reading the code and looking at what it does.

Don't ask us, ask your teacher.

It is possible to convert C++ code to mathematical expressions. And it's basically straightforward. I think your scheme for this is fairly straightforward, except that you seem to write the +...