General C++ Programming - C++ Forum

error C2228: left of '.Symbol' must have class/struct/union

I continue getting this same error:error C2228: left of '.Symbol' must have class/struct/union Any Help into understanding this error will be greatly appreciat...

[1 reply] : In the future, try to put your code in code tags. They show up as "<>... (by doug4)

by michael10024

Prim's Algorithm Implementation Help

Can anyone implement the prim's algorithm code using binary heap (SET or PRIORITY_QUEUE in STL) with E*logV time? Thanks in advance.

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by TheDestroyer

Is this a bug in MinGW compiler?

For a base class and a derived class: class MyBase { public: double mynum; }; class MyDerived : public MyBase { void start(); }; Now the weird thi...

[15 replies] Last: [quote=cire] Usually such issues should also be enforced by the use of... (by TheDestroyer)

by phillyman1025

Multiuser chat server

This code is from http://beej.us/guide/bgnet/ I don't understand what is happening in what he labeled as the "main loop" Specifically the receiving and sendin...

[no replies]

by bond5611

Solve this please....

What is the mistake which should be remove to work the following program ok.Remember the class userDetails is templated and for this the error is shown by the c...

[2 replies] Last: Thanks peter solved. (by bond5611)

by xSteely

newDay help! urgent! due today!!!

Hey everyone. I'm almost finished with my newDay program... with 1 small problem. whenever i input the day into the program, the day comes up as 1 every time. s...

[2 replies] Last: thanks for the help! it helped a tad... but you were right, i had many... (by xSteely)

by hnefatl

Reading/Writing data to a file

Hi, I'm trying to make a basic program that writes a number to a file as a series of letters, then reads them out again as letters and converts them to an in...

[3 replies] Last: Sorry, I forgot to wipe the file's data; it works perfectly now. Than... (by hnefatl)

by Williamk

Trying to get a text file into an array

Hello, I am trying to get a text file into an array, here is what I have as code: // ifstream constructor. #include <iostream> #include <fstream> usi...

[3 replies] Last: Please use [co de][/co de] tags The problem is that you are writing... (by Bazzy)

by kemple

Ask a Friend lifeline class help

Trying to figure out this CallAFriend class, any suggestions? My code is set somewhat random just trying to set up some of the main functions. ◦ If this life...

[no replies]

by bond5611

How do I call?

How do I call the parametrized constructor while creating pointer objects?

[2 replies] Last: Simply pass the arguments like Zhuge said. Note the difference between... (by incognito)

by gpink88

error list- simple math computation

Hello I just started a c++ class. I have no experience with programming so bear with me. I've come across a few errors, which i can't understand why. H...

[1 reply] : This answer = 1+3+5+7+9+(2n - 1); Should be this answer = 1+3+5... (by htirwin)

by bond5611

Template Objects.

Guys i have template class and want to allocate memory dynamically for it. currentAffairs<string> *objForCAffairs; and then: cin>>(*sizeG); objFo...

[3 replies] Last: objForCAffairs is not a currentAffairs. It's a currentAffairs<string>.... (by Lachlan Easton)

by BotHH

Threading and pointers to structures

Hi, I can't get the values in my structure to come out it just seems to print the location in memory. Any help would be much appreciated. // lab5.cpp : Define...

[2 replies] Last: Thanks man. I was trying args.id. thanks again (by BotHH)

by kjoshi

Collision problems. Urgent!

Hi guys posted last time, making a simple pong game as a coursework and cant seem to get the ball to hit of the paddle I will post the code because I really am ...

[3 replies] Last: I have created the class for rectangle, and that all seems to be fine,... (by kjoshi)

by Irwoo

Function and arrays

How do you make a function accept an array and the size of the array as parameters?

[2 replies] Last: @buffbill: Umm.... I'm not sure what you were trying to do there? An ... (by ModShop)

by Muckle ewe

Creating class object dynamically in a 'manager' class

So let's see if I can explain this right. I have an object manager class that handles a few derived classes. Everything to do with the derived classes is sor...

[4 replies] Last: Macros, people, macros! class Base {}; class MyClass1 : public Base {}... (by LB)

by optimus203

Sum of 2 values from map with string keys

Hey everyone. I'm trying to add the sum of 2 double values from a map who have a string key. I think the operator needs to be overloaded to accomplish this. ...

[no replies]

by viliml

template inside a tempate

It there any difference between, for example template </*something*/> template</*something else*/> /* your function or class that uses those templates*/ a...

[1 reply] : If by your first method you mean something like this template <type... (by guestgulkan)

by GFreak45

template class function parameter errors

This is the class: template<class _TYPE, class _VALUE = int> class avltree; This is the function: template<class _TYPE, class _VALUE> avltree<_TYP...

[3 replies] Last: Seems to work fine for me. Simplified version below. idTree is a sta... (by rollie)

by amiroops

the break point will not currently be hit. invalid file line

in a c++ program I get this error: "the break point will not currently be hit. invalid file line" what should I do?

[2 replies] Last: Thank you, I was looking for more sophisticated solution, I need that ... (by amiroops)

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General C++ Programming - April 2012 (Page 8)