General C++ Programming - C++ Forum

class Invoice 8 { 9 public: 10 virtual void print() = 0; 11 Invoice(){cout<<"invoice constructor"<<endl;} 12 virtual ~Invoice()...

[16 replies] Last: [quote=jackel7777] Since p,q are not defined in Invoice class but in t... (by Galik)

by NYCrealist123

Arrays- this gives right answer but after the "Enter score for" part weird numbers come after it and ill show u in the reply

#include <iostream> #include <cstdlib> using namespace std; int main () { int score ; int total=0; for(int a=0; a<=4; a++) ...

[3 replies] Last: ok that works, thanks and another question how would i get the average... (by NYCrealist123)

by iSkull

Need some help with prointers to member function

i need to create a database of references to specific member functions of different classes, and call all of them trough a function. This is a code example o...

[5 replies] Last: Solved! I used a base class and virtual functions: #include <iostream... (by iSkull)

by Khatuni

Playing mp3 with Fmod

I would like to create an as simple as possible console program that just plays a certain mp3. I'm using the mingw compiler (in Dev-C++). Fmod is probably the b...

[no replies]

by eman ahmed

reading any file

hi,all I'm new to c++ and I want to read any file byte byte and then get the ASCII code fore each file. I searched in Google and also search this forum bu...

[1 reply] : You might want to check if there is an error on your fstream before tr... (by Galik)

by muham2k

I have no idea of how to create a "class"

Hi experts! Can some one help in explaining the step i can take to create class name "Parking" in a parking ticket calculating system, with member function that...

[2 replies] Last: thanks. just trying to get help from all possible corners. (by muham2k)

by lukemuller

Help with Airline Seating Assignment (Array)

Hey guys, I've been having a bit of trouble with my c++ program i'm trying to create for an assignment. I'm still learning, but array's seem to give me the mos...

[no replies]

by omeraslam

Christmas Tree of *

I need this output using simple loops. * *** ***** ******* * *** ***** ******* * *** ***** ******* * *** ***** *******

[1 reply] : you had a post yesterday asking how to output * *** ... (by quirkyusername)

by ashraful

I need to show *** insteed of charecture while input

hello. this is my code which i am trying to work on int main() { int tries = 3; string acc,password,MainPage,dummy; { while (tri...

[12 replies] Last: so whats the password again ? sorry i am really new to this i did not ... (by ashraful)

by hydride

Constant Expression error and some other errors

I received some errors. I can't seem to find the solution. 1>------ Build started: Project: cse30_lab10, Configuration: Debug Win32 ------ 1> prime.cpp ...

[2 replies] Last: First 5 errors happen because you can only declare static arrays of co... (by hamsterman)

by NYCrealist123

Arrays-this gives an error saying that "passing NULL to non-pointer argument 1 of ‘void srand(unsigned int)’

#include <iostream> using namespace std; void arrTest() { int arr ; srand(NULL); for(int i = 0; i < 6; i++) { ...

[7 replies] Last: haha thanks got it now, and thanks to albatross as well (by NYCrealist123)

by hanst99

wxWidgets linker errors.

I am currently starting to get into wxWidgets programming. I successfully build wxWidgets, and creating a new wxWidgets project in Code::Blocks works (builds an...

[13 replies] Last: From docs/tech/tn0019.txt here's the note; if "winundef.h" fixed the p... (by stahta01)

by jonnitwo

proram is possible

Is it possible to make a program that automatically takes number and find it's sum, Avg. or show their result ?

[2 replies] Last: enter a number......123 enter a second number......456 sum=579 average... (by buffbill)

by arvindkits

loan repayment

Monthly installment calculation is (Loan Amount / (12 * number of years of year repayment)) + 7% of (loan Amount) In case the customer forgets to pay the inst...

[2 replies] Last: I suggest you run it out in lotus or excel and then post your code ind... (by buffbill)

by NYCrealist123

Array-error i get is invalid function declaration, need help

#include <iostream> #include <cstdlib> using namespace std; int main { int arr ; for(int i = 0; i < 6; i++) { int r = rand() %...

[1 reply] : You need () after main. (by firedraco)

by ModShop

unnamed namespace

Say I have an unnamed namespace that contains some functions local to a certain file. Is it posable to declare the functions inside of the namespace and define ...

[2 replies] Last: So I just use the namespace keyword again when defining the function? ... (by ModShop)

by quirkyusername

resolving collisions

Hi all, When making games in the past, I had stored pointers to base class entities in my world and to determine the type of entity when a collision occured I ...

[15 replies] Last: @ultifinitus since I'm not far into the project there is currently n... (by quirkyusername)

by rincewind2

Toggle comments hack

Hi all, I discovered this by accident and thought that it`s worth sharing. Using the "hack" described below, you can switch between two code parts, by delet...

[5 replies] Last: eh? you change the 1 to 0 to toggle. *cough* Yeah...I uh...knew tha... (by firedraco)

by mansoorazeem

Deleting vector using user input

i want to delete items from vector and i want to take user input for doing so.kindly see the BOLD part of code. I want to delete the device and corresponding vo...

[1 reply] : You could use a set =] http://cplusplus.com/reference/stl/set/ (by ultifinitus)

by jackel7777

smart pointer

how do i use a auto_ptr instead of a simple pointer here; class factory 27 { 28 private: 29 static Invoice* ptr; 30 public: 31 factory(){...

[17 replies] Last: so does that mean that new derived1 and new derived2 will be automati... (by Disch)

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General C++ Programming - April 2011 (Page 27)