C++ :: Tracking From What Class Functions Called At Runtime
Feb 23, 2015Is there any way to track what functions from what class are called at runtime? What I mean is a list of functions or classes which have been called at runtime.
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C++ :: Back Tracking And Goto Functions
Apr 27, 2012I have a project where I have to schedule 3 doctors for 28 days. Doc A, B, and C. The rules are:
1. They can't work back to back, but only on weekends. Example Doc. A can't work Monday and Tuesday, If Doc. A works Saturday, he must work Sunday also.
2. Doc. A and B work alternate weekends.
3. Doc. C can't work Tuesday or weekends.
I'm trying to base my project off of the 8 Queens program that uses backtracking and the goto function. Right now, I'm just trying to get my program to print this
100100100
010010010
001001001
Here is my goto Code
#include "stdafx.h"
#include <iostream>
#include<iostream>
using namespace std;
void print();
#define n 28 //28 day schedule
int a[n]={};
[Code] ....
If you look at my code you will notice that it prints out like this, where array c doesn't take in account for array a.
1010101010101
0101010101010
1010101010101
I need getting the program to modify a[], b[], and c[] when necessary. I should be able to change any array element to '1' and it will automatically fill in the schedule by itself. example
010001000101001
100100101010010
001010010000100
C++ :: Pure Virtual Function Called At Runtime
Jul 12, 2014I'm currently making a game and what happens is that during runtime, it suddenly closes and a message is shown in the console saying "Pure virtual function called at runtime".
Here is the code: [URL]
The problem seems to occur somewhere between lines 662 - 695. And it seems to only happen when the size of the vector reaches 1.
Visual C++ :: Can Two Functions In Same DLL Be Called By Two Threads?
Aug 27, 2014I write a DLL MyDLL.dll with Visual C++ 2008, as follows:
(1)MFC static linked
(2)Using multi-thread runtime library.
In the DLL, this is a global data m_Data shared by two export functions, as follows:
ULONGLONG WINAPI MyFun1(LPVOID *lpCallbackFun1) {
...
Write m_Data(using Critical section to protect)
[Code]....
Although MyThread1 and MyThread2 using critical section to protect the shared data m_Data, I will still suspend MyThread1 before accessing the shared data, to prevent any possible conflicts.
The problem is:
(1)When the first invoke of MyFun2, everything is OK, and the return value of MyFun2(that is nResult2) is 1 , which is expected.
(2)When the second, third and fourth invoke of MyFun2, the operations in MyFun2 are executed successfully, but the return value of MyFun2(that is nResult2) is a random value instead of the expected value 1. I try to using Debug to trace into MyFun2, and confirm that the last return statement is just return a value of 1, but the invoker will receive a random value instead of 1 when inspecting nResult2.
(3)After the fourth invoke of MyFun2 and return back to the next statement follow MyFun2, I will always get a "buffer overrun detected" error, whatever the next statement is.
I think this looks like a stack corruption, so try to make some tests:
1.I confirm the /GS (Stack security check) feature in the compiler is ON.
2.If MyFun2 is invoked after MyFun1 in MyThread1 is completed, then everything will be OK.
3.In debug mode, the codeline in MyFun2 that reads the shared data m_Data will not cause any errors or exceptions. Neither will the codeline in MyFun1 that writes the shared Data.
C :: Write A Program With Two Functions Both Called From Main
Mar 14, 2013Write a program with two functions both called from main(). The first function just prints "Hello". In the second function ask the user to enter a number. Calculate the square root of the number and return the result to main(). In main() print the square root value.
Code:
#include<stdio.h>
#include<math.h>
float fun3 (float );
main()
}
[code]...
Visual C++ :: List DLL Library Functions Signature At Runtime
Dec 31, 2012I want to know how to list the all the symbols in the shared library(dll or .so file). I dont want commands like nm or objdump or depends.exe . I want to get the list of functions available in shared library programmatically at runtime (after calling loadlibrary/dlopen and GetProcAddress/dlsym). Is there a way to get the complete signature of functions in a shared library?
View 2 Replies View RelatedC++ :: Can A Class Constructor Be Called Like A Method?
May 17, 2013When the below is done, does it call the constroctor only, and if yes, constructors do not have return types so how does it work? is there anything behind the scene?
wxAddHandler(new wxPNG_HANDLER);
and
sf::RenderWindow(sf::VideoMode(...),...);
C++ :: Base Class Function Gets Called
Oct 26, 2012Here are the classes:
BaseClass.h
Code:
class BaseClass {
public:
BaseClass();
virtual ~BaseClass();
virtual void printStuff() const;
[Code] ....
When I call printStuff, the DerivedClass's function gets called. Now, if I remove the const part from the DerivedClass's printStuff function, we call the BaseClass's printStuff function.
C++ :: Define A Class For A Type Called CounterType
Apr 29, 2014Define a class for a type called CounterType. An object of this type is used to count things, so it records a count that is a non-negative whole number.
Include a mutator function that sets the counter to a count given as an argument. Include member functions to increase the count by one and to decrease the count by one.
Be sure that no member function allows the value of the counter to become negative.
Also, include a member function that returns the current count value and one that outputs the count. Embed your class definition in a test program and run sufficient tests to verify it all works correctly.
C/C++ :: How To Access Linked List Functions From Stack Class Without Functions
Mar 20, 2014I'm a little confused by my programming assignment this week. I've been working at it Wednesday and I've made progress but I'm still confused as to how I'm supposed to do this. The class I made is called Stack, and it's derived from a template class called StackADT. We also utilize a class called unorderedLinkedList, which is derived from a class called linkedList.
We're supposed to implement all of the virtual functions from stackADT in the Stack class. The Stack data is stored in a an unorderedLinkedList, so what I'm confused by is how to implement a few of the Stack functions because there are no functions in unorderedLinkedList which we could call to manipulate the data.
As you can see from my attached code, I'm really confused by how I'm supposed to implement the pop() and top() functions, and I also think my initializeList() function is wrong. We don't have any similar functions in unorderedLinkedList to call, so I'm at a loss of how i'd access my unorderedLinkedList. My initial thought was to call the similar functions in the class that unorderedLinkedList was derived from, linkedList, but I'm unsure of this is what we're supposed to do, or if theres actually a way to access my unorderedLinkedList without having to use the functions from the base class.
NOTE: We're not allowed to modify stackADT, unorderedLinkedList, and linkedList.
Stack.h
#include "stackADT.h"
#include "unorderedLinkedList.h"
template<class Type>
class Stack: public stackADT<Type>{
template <class T>
struct nodeType
{
T info;
nodeType<T> *link;
[Code]...
C++ :: Creating A Class Called Time - Operator Overloading
Feb 18, 2015I am creating a class called time and we've had to do operator overloading for <, > , <=, >=, ==, !=, ++, --, >>, <<, * , +, and -.
Well I have done and error checked them all. The only one I cannot seem to get right is the minus and its because of the error checking. I am having issues with times like this
t1 = 0:0:2:3
t2 = 0:0:1:4
t1 - t2 should equal 0:0:0:59 but it returns 0:0:1:-1.
(days:hours:minutes:seconds)
I need it to check for all cases and I just do not know how. Here is the code I have so far:
time operator- (const time& x, const time& y){
time subtract;
subtract.days = x.days - y.days;
subtract.hrs = x.hrs - y.hrs;
subtract.mins = x.mins - y.mins;
subtract.secs = x.secs - y.secs;
[Code] .....
C/C++ :: Class Square Composed Of Two Points - Destructor Called Twice
Nov 3, 2014I have a class Square that is composed of two Points, I pass the former to the Square as references (second ctor) and two Points are created.
The problem is, at the end of the program, 4 Points are now being deleted which suggests that somewhere copies were made (regardless of the references) and the m_p1, m_p2 have different addresses than p1 and p2.
#include <iostream>
using namespace std;
class Point {
public:
Point();
Point(double x,double y);
double printCor() const;
[Code] .....
Even though, the objects were passed to the ctor by references, the copy constructor (compiler generated) for Point was called and now we have two points and an object square with distinct Point objects.
C/C++ :: Array Of Functions Pointing To In Class Functions With Arduino
May 3, 2013At the moment im trying out with pointing to an array of functions. I got this working as following:
typedef void (* functionPtr) ();
functionPtr functions[2][2]={{do11,do12}, {do21,do22}};
void do11(){DEBUG_PRINTLN("11");}
void do12(){DEBUG_PRINTLN("12");}
void do21(){DEBUG_PRINTLN("21");}
void do22(){DEBUG_PRINTLN("22");}
void loop(){
A=0;
B=1;
functions[A][b]();
}
But now I'm trying to use this to point to a function inside a class so instead of do11, i want to be able to point to Basic.Do11. Somehow this doesnt work and I keep on getting this message:
error: argument of type 'void (Basic::)()' does not match 'void (*)()'
C++ :: Constructor Exercise - Creating A Class Called Screen With Some Specifications
Feb 15, 2014This exercise is from C++ primer 5th edition. I have not understood everything about constructors, mainly about how they function.
Work prior to the exercise was creating a class called screen with some specifications. This is the class:
Code:
class screen{
public:
using pos = string::size_type;
screen() = default;
private:
pos height = 0;
pos width = 0;
pos cursor = 0;
string contents;
};
The exercise goes as follows:
Exercise 7.24: Give your Screen class three constructors: a defaultconstructor; a constructor that takes values for height and width and initializes the contents to hold the given number of blanks; and a constructor that takes values for height, width, and a character to use as the contents of the screen.
Giving the screen a default constructor was easy. The next part is probably easy aswell, I just dont understand what they mean when they say "and initalize the contents to hold the given number of blanks" and something in the 3rd part when they say "character to use as the contents of the screen".
Think I have made a breakthrough... Would the constructor for the second part look like this:
screen(pos ht, pos wd) : contents(ht*wd) {}
or something?
C++ :: Class Safe Array Type Print Function Not Working When Called
Oct 22, 2013I've created a function where you can choose any bounds for an array based list (positive or negative, as long as the first position is smaller than the last position). However for some reason when I call the print() function in my application program it doesn't do anything. My print function is technically correct (I still have work to do on the output) but I can't figure out why it wont show anything at all. Below is my header, implementation, and main program files, along with results from running the program.
Header File:
//safearrayType Header File
class safeArrayType {
public:
void print() const;
void insertAt(int location, const int& insertItem);
safeArrayType(int firstPlace=0, int maxPlace = 100);
[Code] ....
ResultsEnter the first bound of yourlist: -3(this was my input)
Enter the last bound of yourlist: 7(this was my input)
Press any key to continue...
C++ :: Tracking Prices Of Some Asset Over Time
Feb 28, 2013You are tracking the prices of some asset over time. The user will input a series of floating-point prices (e.g. 16.105 for sixteen dollars, ten and a half cents). When the user enters the price 0 (zero), output the overall minimum, mean, and maximum prices. Hint: there could be thousands or millions of prices to process, so do not try to store each one as it arrives, but keep a running total..
I've been using a while loop for user input, but I don't know how to get the last 0 that marks the end of the list to not be included in calculating the average.
C++ :: Sorting And Tracking Index Program
Oct 10, 2013I have been learning c++ for about 1 month. So my problem is that suppose i have array[6]={10,-1,3,54,2,12}
I want to fill new array with {1,4,2,0,5,3}
because -1 is the lowest and its index is 1
2 is the lowest and its index is 4
3 is the lowest and its index is 2
10 is the lowest and its index is 0
12is the lowest and its index is 5
54 is the lowest and its index is 3
I want to sort from lowest to highest but using the index value. Here is what i have but the output i get is {1,4,2,4,5,5}
1,4,2 is right but then its wrong.
#include <iostream>
using namespace std;
void swap(int& v1, int& v2);
int main() {
const int size = 6;
int arry[6]={10,-1,3,54,2,12};
int sortedArry[6];
[Code] ....
Visual C++ :: Toolbar Position Tracking
Apr 19, 2013How to detect when mouse pointer entering on toolbar .
View 2 Replies View RelatedC++ :: Calling Derived Class Functions In A Function With Parameter Of Base Class
Mar 30, 2013Say I have 3 classes:
class Player {
public:
virtual func1();
[code]....
Say in my main class, I have a function fight(Player p1, Player p2) and I would like to do something like this in the fight function, given that p1 is the human and p2 is the computer:
//function fight()
fight(Player p1, Player p2) {
p1.func2();
}
//using function fight()
fight(human, computer);
When I compile the program, I got this: error: ‘class Player’ has no member named 'func2()' What can I do to allow p1 to call func2 inside fight()? I'm not allowed to use pointers as the parameter for fight() and have to use the signature fight(Player p1, Player p2).
C++ :: Size Of Derived Class With Overriding Virtual Functions From Base Class?
Jan 21, 2014The compiler creates virtual table for the base class and also for the derived class whether we override it or not.
That means each class has separate virtual table. when we get the size of the each class with out any data members... the size of base is -- 4 bytes(64 bit) and the size of derived is -- 1
The size of base class 4 is correct since it creates the virtual pointer internally and its size is member data + virtual pointer, but it in this case I have included any data members so it has given 4 byts.
But why in case of derived is 1 byte, since it the derived class has overridden the virtual function from base, this will also contains the virtual pointer which will be pointing to derived class Vtable, it the size of the class suppose to be 4 instead of 1 byte.
#include<iostream>
class A{
public:
[Code].....
C++ :: Use A New Class On Functions?
Feb 14, 2015how use a new class on functions?
class test
{
public:
int a=0;
[Code]....
i did something like these with my image class, but i get wrong results.
C++ :: Calling Functions Of Class And Outside With Same Name?
Apr 6, 2013Just a few moments ago i was just doing foolish things in c++ and discovered something new. Though some of you might have known this, for those who dont know, take a look at the follwing 2 small programs,
#include <iostream.h>
#include <conio.h>
void main();
void loop()
[Code]....
so here is my problem. i think u wud have figured out what m trying to do above. am actually calling the main() of the class and from there, i want to call the usual main... the problem is, during A.main()'s run, if i refer to main(); , that call represents itself, that it, it is like it calls itself. How on earth can i call the outside main?
C++ :: Communication Between Functions Of Class
May 19, 2013I have a class as follows:
class testa {
public:
testa_b();
~testa_b();
testa_c();
}
Then I have defined some variables in testa_b:
testa::testa_b()
{
double aa = 1.0;
}
What is the easiest way to make testa_c() can use the aa defined in testa_b() (without declaring them in the class)?
C++ :: Where To Put Non Class Member Functions
Sep 27, 2013If you are doing some big program, usually, how do you organize the files? Put the class and its member in head file, but where to declare non member functions and where to define them? I don't want to put them all in one cpp file. If not, how to make them visible to the main cpp file?
View 4 Replies View RelatedC/C++ :: How To Use Fstream Functions In A Class
Apr 4, 2014I want to design a class that will open a text file and manipulate the data in it. And I have to use all these functions from fstream like ifstream, ofstream, seekg etc. The problem is that I can't get the first part to work (getting my constructor to open the file using ifstream). I've posted my test.h file below.
#ifndef TEST_H_INCLUDED
#define TEST_H_INCLUDED
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
using std::ifstream;
class Test {
[Code] ....
C++ :: Share Values Between Functions In Same Class?
Mar 22, 2013Code:
#ifndef CANDIES_H
#define CANDIES_H
#include <iostream>
#include <fstream>
#include <Global.h>
class Candies
[Code]...
Code:
#include "Candies.h"
#include <Windows.h>
#include <iostream>
#include <fstream>
#include <sstream>
[Code]...
When I tested it, the file name in getName() outputted the right file name. However the file name in loadName() does not print out anything in the console window.
I want it to be so that the strings in [I]name_addTXT.c_str() in both functions are equal.