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General C++ Programming - April 2012 (Page 44)

by Invader2010

how do i make a button do an action?

say maybe, if i pressed the button maybe it would output a message that says "hi"?

[4 replies] Last: windows (by Invader2010)

Consider this code: unsigned char alpha = 0xff; unsigned short result = alpha << 12; I thought that expression alpha << 12 results in 0 as 'alpha' is '...

[3 replies] Last: > So it depends on the type of lvalue on the left side of the '=' sign... (by JLBorges)

by JCaselles

Tellg() + "\r\n" (windows newline) malfunction. (.csv file)

Hi everybody, I've already posted in the beginners forum a problem I was facing, and after all, I've realized there seems to be a heavy problem (maybe a bug?) ...

[4 replies] Last: Ok, now I get it! I can use binary mode to use tellg() and still use g... (by JCaselles)

by jambolina

Help with embedding python into C++

Hello, I hope this is in the right topic! Please could someone tell me how to use the embedding features of python. I know how to use "PyRun_SimpleString();" ...

[no replies]

by chianda

Problems in bitwise operation

Dear Sirs, I need to write a function that, given in input two long numbers in the interval (0,pow(2,L))(L is given in input), can count how many different bi...

[3 replies] Last: Thank you very much! That was the problem and I don't think I would no... (by chianda)

by faizalabdrahman

Overloading method for a specific type in a template class

Hi fellow programmers of cplusplus! I am wondering if it is possible to have an overloaded function of a specific type in a template class. If it is possible, h...

[10 replies] Last: ne555: You're right. I managed to overload a single method using te... (by faizalabdrahman)

by krystalsdad

Uninitialized variables (1,2)

Can anyone tell me why uninitialized SHORT variables in C++ console applications always default -13108 and INT variables to -858993460. Just curious.

[21 replies] Last: Nope, it wasn't me. Perhaps this feature shouldn't be anonymous (by krystalsdad)

by Jggrnt

Building a map, calculating distance on it

Hello. I am studying for informatic olimpics. In a question I need to build a map and be able to tell distance between buildings. For example, a city map...

[2 replies] Last: Thanks for the help. I succesfully created the city map. But, I may... (by Jggrnt)

by srikanth chitturi

template error

I am doing a linked list program in cpp . I am getting an error at line 7 saying that start_list is not a template.what is the wrong I am doing? But this co...

[1 reply] : Are you trying to use std::iterator ? http://www.cplusplus.com/referen... (by R0mai)

by digrev

i am getting a lot of errors

hi , i am trying to learn c++ and i just copied and paste a sample but i am getting errors 13 C:\Users\habour0\Documents\Untitled2.cpp `cout' undeclared (fi...

[2 replies] Last: There is a little mistake i guess... What are these symbols: ‹› ?... (by S G H)

by ARWA

garbge value in the output..~.~

hi, when i display my array of charecter it displays the massage inside it and some junk values were i have sepecified the size of the array and what it dis...

[1 reply] : 'newFrams' requires the trailing 0. On line 9 write newFrams=new char... (by coder777)

by Hollywood

Char and switch statement issues

Hello, I've just started learning C++, and I can't figure out the issue with my code. I've tried a few different ways to get a switch to work with a single dec...

[1 reply] : char my_Command ; my_Command is a pointer to a char. I suspect you ... (by Moschops)

by Smoke

Incorrect Strlen value returned

I receiving an incorrect strlen value of a, it return 101 instead of 100, has anyone come across this error before? Has it been corrupted during conversion. ...

[2 replies] Last: The strlen function tells you how many chars there are from a pointer ... (by Moschops)

by atjm88

RGB to Gray Image

Hi, can anyone tell me how to convert RGB image into Gray Scale Image using C++? Thanks... I've tried it using C++ in OpenCv but don't know how to show it ins...

[6 replies] Last: Thanks ne555, I've change the line to the one below using imshow, but ... (by atjm88)

by arn2025

random drawing tool

i have a list on names in a csv format, i want to create a random draing tool that will pick 5 winners from this list.

[no replies]

by noobcoder

How to count the number of unique characters in a string?

Hi guys, I'm trying to implement a bit of code in a program i have made but I'm kind of stuck on how to actually do it. What i want is to be able to count...

[no replies]

by bennigan88

N Queens Backtracking Algorithm Confusion

Hi, I am trying to understand how to use backtracking to solve the n queens problem. I do not know how to use stacks, and I've never used multidimensional array...

[no replies]

by FalterrisAunvre

Including all of the files in a directory

In an attempt to add a bit of modability to my game, I want to make it so that all of the .cpp/.h files in a certain directory are included. Files are NOT my st...

[2 replies] Last: Take a look at boost::filesystem. It will let you iterate through eac... (by Stewbond)

by H2C

Data Structure ( LinkedList ). Can anyone knows how to make a reverse linked list using C++ ?

Make a reverse LinkedList

[1 reply] : Most of us probably know how to, yes. Thank you for your concern. We... (by webJose)

by lasxx005

Segmentation Fault: Dynamic Array of Strings

This program is supposed to allow the user to enter 5 names and then add one, delete one, and try to delete one that's not on the list. I can add one, but keep ...

[1 reply] : just found the error: I never initialized index to 0 (by lasxx005)

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