Just a quick comment (again). The problem I though was not using printf. Yes I know that is not very C++ but if you need exact formated output, you normally end up at the boost::format class. That...

I understand for quick solutions you would follow AncientDragon's sage advice.
However, that always leaves a sour taste since I am sure your want to know how to do it:

So here goes
...

Well I have written a system for extracting maths equations from input text which I currently use in several projects. So I just want to ensure you know what you are getting into it is about 2500...

I am sorry I don't like jonsca's solution, it has ugly temporary variables, that aren't necessary.

The better way to do this (IMHO) is to add two operators. One is operator<< and the other is...

Ok, for maths courses have a look at the MIT lecture page http://ocw.mit.edu/OcwWeb/Mathematics/index.htm.

The undergraduate stuff is a great revision guide and most of it I would expect anyone in...

This code is a mess, and 99% is that it is mixed c and c++ , it has not been set out tidily so neither I nor you know what is going on.

Things to fix:

Why use malloc to allocate memory use...

This forum and others see this question a lot and you get answers that range from none - > everything.

So I will point out something that I have noticed, I have never studied and understood any...

Indeed sfou, it is a method that is absolutely instinctive for most programmers. It is mainly mathematicians that have the big hang up with that sort of construct. They (and theoretical physists)...

Sorry but the main problem is that you have over complicated the if structure in FindFirst.

Several points

(i) You pass the value first BUT don't actually use it.
Let me elaborate. You use a...

Ok you have a number of problems:
So let me (a) post some working code: (b) tell you what each line does:

int main()
{
std::fstream bfile("file.bin",
...

Ok the original post was about gcc, which has a tolower function that
does not return a char, it returns an int and takes an int. That is because it works with internationalized character sets. So...

If you do write your own Gauss-Jorden elimination procedure, be very careful to deal with the huge numerical rounding errors. Re- stabalization of matrix after most steps is essential. Also please...

As far as I understand the standard, this is not possible [I stand to be corrected].

There are slightly upsetting work-arounds.

First: If you don't need the virtual aspect, this is easy use a...

Ok I am not going to deal with all of this mess but point out some of the basic errors and then ask how did you manage to get to this point.

-- Talk your first effort,

double
Individual::...

First thing that comes to mind is that a[9] and c[9] are not initialized.

Next you are using variables columns and row. So check that this->rows == u.columns. Then set the data in this. as c[]...

First off, you cannot write fractions fractions :: operator/(fractions f); within the definition of a class.

Second, you have provided a default constructor that set the fraction to 0/1 . That...

I think that you have got confused with the syntax of declaration and implementation. So here is an example with most of the common things you will likely need. [Please ask if I have missed...

I agree with Jonsa's point you can put [icode]using std::cout; [/CODE] etc, although it is important to remember that they can be put within a scope, e.g. in a function and not the global scope.
...

Well DONT use using namespace std;
You can write it like this:

std::ofstream File("Output.txt")
File<<"This is to the file"<<std::endl;
std::cout<<"Written line to the output file"<<std::endl;...

First: USE CODE TAGS

Second: you don't not have to declare the variable name in definitions e.g. void resultsfn(int& A); is the same as
void resultsfn(int&);.
This often makes code clearer
...

The bovious thing to do is to run it in the debugger e.g. gdb or ddd
Compile with g++ -g -o Prog prog.cpp, and the run as ddd Prog. When it hits the seg-fault, use up until you see the problem...

Well you don't seem to have written a operator>> for class ballTeam. I could be wrong since you didn't include the definition files (.h files).



I

I am not going to deal with all the things that are wrong here

They include:

(a) a missing = in a test else if (opr1 ='(')[/icode[
(b) stupid reassignment [icode]ifx[i] = ifx[i+1]; but loop...

Seriously, you are just going round in circles. You HAVE TO WRITE SOMETHING SIMPLER so that you get to grips with variables/ if else constructions / functions. And you are going to have to do it in...

This is code absolutely begging for a loop!!

Your actual problem is that you test x then y. That is incorrect. (I think)

Consider a box with coordinates (0,0) and (10,10). I.e it is a square of...

If you have a problem like that and don't understand the compiler error, then split the function into bit, e.g. calculate without the sqrt e.g.


double d=a+b;
distance=sqrt(d);


You have...

The problem you have is temporary values and what happens to them:
I think this will be clear (I hope :)

The problem is that your are taking a copy of the value in the list. This does indeed...

The first problem is that your are returning a string from a function that says it will return a floating point number..
e.g. points has returns "miss" But requires it to return a floating point...

If you are debugging code (and that is what you are doing here), you need to step through the code and check your assumptions. That can be done with a traditional debugger that lets you see each line...

First things first: Dont use system("Pause") it has been discussed to death here and everywhere on the web.

Second: The next problem is that you are using temp1 without initializing it. i.e every...

Calling the destructor normally implies that the memory is listed as free, i.e. you can quickly find that the memory is corrupted with something else.

Try valgind to get a detailed picture of...

Let use be a little careful here about the sequence of events.
First off, if you examine the assembler/machine code that is 100% exactly what is going on. However, (a) that may mean that your...

firstPerson's answer works and solves the problem BUT for a large classes you might prefer to use explicit instantiation. [which gives the beginner a better idea of what is happening (sometimes)].
...

What about adding a class. Starting with that is a great way to group data together.

class UserInfo
{
private:
std::string Name;
std::string Pass; // THIS IS NOT SECURE
...

The reason (for good/bad) is that when the compiler hits instances.inc.
It has not seen the definition of graph.
If you put include instances at the end of graph.cpp all is fine.

Note that you...

It doesn't have an inbuilt function (but I am sure they are in libraries)
BUT surely it is this

int totalMin=890;
int min=total % 60 ;
int hour = (total / 60) % 24;
// etc


not exactly...

You seem to have two cin>>x in your code at lines 23 and 21. I would delete line 23.

I might make count and integer but that is minor.
you have remembered to initialize your variables which is...

Yes the problem is name reuse. The code compiles fine if you cahgne the name OR you put allocator in a namespace e.g

namespace X
{
template<class T>
class Allocator{

public:
...

Well this looks like a c program (not a c++) so I will assume that you are in C and carry on.

The first question is that you have unfortunely added a \n after the %d in the scanf statement. That...

Well ok then don't word the problem as if it is verbatim from the question sheet. Doesn't matter were you are tell us what you have got.

The problem can be broken down in to several parts (a)...