General C++ Programming - C++ Forum - September 2011 (Page 21)

Trouble with a Calculator I just finished.

The program works fine until you access case 7: on line 64. Once you do that, no matter what you input into the program, it quits. //***CALCULATOR*** #inclu...

[6 replies] Last: Even though this post may be solved i need to point 1 small thing: DO... (by eraggo)

by hanst99

MinGW C++0x - problem with array initialization

Technically, this should be legal in C++11(0x), and initializer lists are supposedly supported since GCC 4.4 (I'm using MinGW 4.5.2) - yet I am getting an error...

[2 replies] Last: Nah that's not it. The syntax is correct, the exact same thing works, ... (by hanst99)

by aj3423

compile error extending std list

#include <list> using namespace std; template<typename T> class mylist : public list<T> { typedef list<T> super; public: void my_pop_front() { ...

[3 replies] Last: oh, I got it Thanks~ (by aj3423)

by JohnOh1075

C++ segmentation falut <core dumped>

Hi, I'm a beginners of C++, and I've found something weird error called Segmentation falut <core dumped>. I can't understand why my codes keep making this error...

[2 replies] Last: Using the mighty gdb, I find this: #0 0x0804880b in john_linked_5::... (by Moschops)

by Helegurbann

Same Typely Funcs Definition

#include <iostream> #include <typeinfo> using namespace std; int add(){ int a,b; a=25; b=35; return (a+b); } (typeid(add...

[4 replies] Last: Not really. helios version is better suited in most cases, my version ... (by hanst99)

by ayanda83

How does one convert a C++ code into a graphical application

Hi everyone, i've been studying C++ for quite some time now but i still don't understand how one converts a C++ source code into a fully-functional graphical so...

[5 replies] Last: I think the question was how to introduce GUI code into your applicati... (by hanst99)

by closed account 967L1hU5

Multiple "if" conditions?

Is it possible to have more than one condition in one "if" statement? I read somewhere online that using "|" like this: if (x == 7 | 8 | 9) { action } ...

[2 replies] Last: Many thanks. (by closed account 967L1hU5)

by IceThatJaw

Is it possible to copy a temporary class instance of itself into itself?

I have several bool validation methods in a class that will set data if it is valid, otherwise it does not change anything and returns false. I need to write...

[8 replies] Last: chenqi07, thanks for finding that error for me. When I went to fix it... (by IceThatJaw)

by diskhub

Pthread Qns on Mutex

i have a question regarding pthreads. If i have the following code: pthread_mutex_lock(&mutexT1) DO_Something_A pthread_mutex_unlock(&mutexT1); Ove...

[4 replies] Last: hi thanks for ur reply. in fact, my '2 resources' are indented to be a... (by diskhub)

by TheFlow450

Need Reassurance

With the new version of c++ (c++11) coming out, I'm kind of worried that I'll be confused if I continue learning. So my question is, will there be major chan...

[2 replies] Last: OK, thanks that's one less thing I have to worry about now as I learn (by TheFlow450)

by Ideka

Checking whether an object is an instance of a class or its subclasses (1,2)

Consider the following pseudo-code: #include <iostream> #include <vector> using namespace std; class A { public: A() {}; virtual void foo() ...

[22 replies] Last: I just want my engine to take care of more stuff. E.g. the main loop. (by Ideka)

by lorrainecarla

Reading Text File without spaces

I have problem regarding reading string without spaces. For example: the input text file is this. int a; a = 1+2; the output should be like this. ...

[2 replies] Last: Thank you so much! Btw, what is the real function of FSM? Im sorry, ne... (by lorrainecarla)

by SUMI SUNDARESAN

C++ program needed!!

Hi, I need a C++ program that includes a 'for' loop, 'if' condition, inheritance, constructors, structures, arrays, classes. I need it for my school project. Ev...

[4 replies] Last: You missed a semi-colon after the $ class definition. But, besides tha... (by shacktar)

by Jagman

Need if statement help with a string variable

I am trying to make a program that asks for an answer that is a string, however I cannot make it recognize the correct answer. Any help would be appreciated. ...

[2 replies] Last: Ah i see, that helps a ton! thank you very much! (by Jagman)

by Nisheeth

Help in A timer in C++

I was making a Quiz in the Console. I decided to add an Timer in that runs in the background, and gives the user the Time they took at the end. This is th...

[8 replies] Last: #include "windows.h" DWORD startTime; int main() { star... (by tolga gerekci)

by gibran5876

Unable to print to a txt file while inside a loop

Hey everyone, I want to print data to a txt file using a void function outside the main. The problem is that it only prints the last iteration of the loop cal...

[2 replies] Last: THANKYOU, THANKYOU, THANKYOU (by gibran5876)

by MasterAsh

a question about ln(x) and math.h

hi everyone! i'm trying to write an algorithm that approximates ln(x),and i just can't come up with a decent one...can u please tell me how to do that,or how l...

[10 replies] Last: aw.right.thx dude! (by MasterAsh)

by Chuckleluck

Program should be updating but isn't?

#include <iostream> #include <windows.h> #include <conio.h> using namespace std; void GameLoop(); int main() { char key = ' '; HANDLE hConsole; h...

[5 replies] Last: huh, when I compiled it, it ran. int main() { char key = '... (by closed account zwA4jE8b)

by Robertlzw

pass-by-reference to function vs. to function template

This code does not compile: void f(const int& val) {...} int main() { f(1); return 0; } but this is correct (why?): template <typename T...

[9 replies] Last: I was doing some reading and came across this Only the address of th... (by closed account zwA4jE8b)

by ArpitJ

c++ pointers & arrays

#include <stdio.h> #include <stdlib.h> #include <iostream> using namespace std; int width = 100; int height = 100; float cam = {-1.1,-1.0,1.2}; floa...

[2 replies] Last: Your functions are returning a pointer to an array which is local to t... (by closed account D80DSL3A)

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General C++ Programming - September 2011 (Page 21)