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Beginners - May 2011 (Page 26)

I have some problems about promotion traits template<typename T1, typename T2> class Promotion; template<bool C, typename Ta, typename Tb> class IfThenElse; ...

[1 reply] : Both seem to compile and output the same results on Ubuntu 64 using g... (by kfmfe04)

by helasraizam

Converting two dimensional array to double pointer (T[][]-->T**)

How can I convert a two dimensional array to a double pointer? int f ={{1,2,3},{4,5,6}}; int** dreamon=f; The above does not work, giving the error ...

[3 replies] Last: I would just have to find the pointer of each 1D array referenced by ... (by Disch)

by quasitonality

Nested vector holding user-defined class, won't compile

This code won't compile. It actually doesn't give me any problems until "board.push_back (row);", at which time it gives me a very long and complicated compiler...

[2 replies] Last: Objects stored in a vector need to be default constructable and assign... (by PanGalactic)

by keithzhou

dijkstra algrithm

Hi, i just have question about the dijkstra,does finding the lowest cost in this function means same as finding the shortest path between two places?

[1 reply] : Please do not double post. http://www.cplusplus.com/forum/general/4300... (by PanGalactic)

by forpblop

skiping duplicate entries in a program

I am trying to write a program that alphabetizes names in a file. The program is supposed to skip any blank lines as well as any duplicate names. I can make it ...

[6 replies] Last: Wow great.. it works thanks for your help!! There are some problems th... (by forpblop)

by helasraizam

Questions about double-pointers (int** q)

Does the “new” operator delete whatever the variable was assigned to? Example: Int p ={1,2,3}; p=new int ; //is delete p called? How can one a...

[2 replies] Last: Thanks Zhuge for your quick response. (by helasraizam)

by LittleQuick

Switch statement and Writing to a file

I have a ofstream within a case. case 1: ofstream myfile1 (file18.c_str(), ios::app); if (myfile1.is_open()) { while (myfile1.good()) { myfile1 ...

[2 replies] Last: Posting the rest of your program would be beneficial. Maybe try to dec... (by TrevorD)

by bboy212

random function

How was the random function written? Where could I find the code, or would one of you be able to paste it up here?

[2 replies] Last: http://www.cplusplus.com/reference/clibrary/cstdlib/rand/ (by LittleQuick)

by jimmy5023

about this forum

I want to know is this forum only good at asnwering c++ or it can also answer technical problems?

[2 replies] Last: okay. (by jimmy5023)

by joro550

Int to string

Hey, I've recently been learning some C# and it's been really helpful that every type has a .ToString() method inside their class and I was wondering if there ...

[8 replies] Last: I'm sorry but did any of you even read my post?? I appreciate the ans... (by Duthomhas)

by tonnot

How to return different types ? (1,2)

I'd like to have a function to return a different type depending if the result can be a double a float an int or a long. Is it possible ? Thanks

[29 replies] Last: Well, I figure its worth one more shot... Your design is flawed, an... (by Duthomhas)

by nima0102

Get long value from main()

Hi In my new program I want to get very long value(ex, 13412345236234514123523462354) as parameter from command line,and then process it.I have 2 problem : 1-...

[2 replies] Last: nima's example number is too large even for a long long. Your best ... (by Disch)

by tonnot

Istringstream gives me wrong result for a signed short int

I have : signed short int my_i // -32768 to 32767 std::istringstream i(value); i>>my_i Ok, if I pass value "38000" my_i gives me -27536 Ok, if I pass valu...

[1 reply] : This is correct: 38000 wraps around (due to sign extension) to -27536 ... (by kooth)

by hydride

Dijkstra's Shortest path algorithm help

Hello, I'm trying to complete dijkstra's algorithm but I'm having a really hard time figuring it out. I've made a table with three array's that will keep tr...

[no replies]

by Liang

How to use libraries not in standard path?

I need to use libraries (gsl and deal.ii) to be installed in a public server. I don't have administrative privilege, so they are installed in my home directory....

[2 replies] Last: The deal.ii library works using the provided Makefile. But it is very ... (by Liang)

by SoftBotter

initializer fails to determine size of...

Am I writing a programme intended to read a text file and format the contents. The text file is one long line, and should be formatted such that a new line is u...

[1 reply] : char str = line; 1) This doesn't work and 2) It's kind of stupid ... (by firedraco)

by khaled124

c++ window form

Hi guys, I am a new user for c++ window form. I want to catch a text "from a textbox" and store it into a variable like k for example Thanks in advance

[1 reply] : cli is not C++, but check these links: http://www.functionx.com/cppcli... (by matsom)

by benewen

Please review my code.

#include <iostream> //This will create a function that prints 'You just called a function.' void function() { std::cout << "You just called a functio...

[5 replies] Last: The add function he made takes two parameters and then adds them toget... (by king214)

by Pascal

Please help!

So, i'm following a tutorial provided by Microsoft Visual studio 2010. And i have sumbled upon an error while debugging, i have no experience using c++ so i don...

[4 replies] Last: THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! When i went back and look... (by Pascal)

by chr15chr15

Program terminates unexpectedly

Hi i've been making a game in c++ and SDL (codeblocks IDE) and my program terminates unexpectedly on occasion giving no clear error message. Now i have around ...

[1 reply] : The trick is called debugging. Select Debug/Start or "Step Into". Make... (by Athar)

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