C++ :: Sinking Fund And Calling Functions

Nov 17, 2014

I have to do this assignment but really don't understand the calling and called functions yet. Rewrite your program for computing the value of a sinking fund so that there is a C++ function that is called to calculate the value, i.e., a function that returns the accumulated value based on the number of years with the annual interest rate compounded monthly and a fixed-size monthly deposit.

My program is:

#include <iostream>
#include <cmath>
using namespace std;
int main() {
double R, r, t;

[code].....

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C++ :: Calling Template Functions

Feb 21, 2013

How do I call these functions from Mechanical.h???

Mechanical.h
#ifndef MECHANICAL_H_
#define MECHANICAL_H_
class statics { public:

template<class T> struct Inertia_types {
T Rec(T _x, T _y);
T Tri(T _x, T _y);

[Code] ...

I am trying to create templated functions which I can apply all data types to except for strings and other types such as wchar. Am I also writing these correctly? This is my first attempt ever doing this.

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C++ :: Calling Functions Of Class And Outside With Same Name?

Apr 6, 2013

Just 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?

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C++ :: Calling Functions From Templates?

Mar 14, 2013

Having issues calling my arguments from my templates, when i declare x and n in the main it comes up with errors

code below:

#include <iostream>
#include <cmath>
#include <cstring>
#include <string>
#include <string.h>
using namespace std;
int intInput1, intInput2;

[code].....

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C :: Writing Factorials And Calling Other Functions To Do So

Jul 6, 2013

I am trying to get this statistical equation to work. m! / n! (m-n)!.

Code:
#include <stdio.h>
long factorial_M(long); // function prototype //
long factorial_N(long);
long total (long);
int main(int argc, const char * argv[]) {

[Code] .....

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C++ :: Calling Functions - Vector Of Pointers

Mar 27, 2013

I have a vector of pointers inside a seperate Exam class.

vector <Question* > question_list

The Question class is my base class in which I have derived sub classes for the different types of questions (MultipleChoice, LongAnswer, etc.). I am using my vector to hold the different types of questions.

in each of those classes I have virtual "write" functions in both the base and the derived classes, that write to a file differing for each type of question.

My problem now is calling the write function from a Exam function. I've tried several methods, such as:

for (size_t i = 0; i < question_list.size(); i++) {
question_list[i].write(testfile.c_str());
}

but it comes with two errors: "error C2228:left of '.write' must have class/struct/union" along with "IntelliSense: expression must have class type"

I have made a write function for the exam class as well but am not sure what it should include since the Exam class is not a derived class of the Question class.

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C++ :: Create Two Threads Calling Even And Odd Functions

Mar 1, 2013

I want to create two threads which will be calling even and odd functions where even function should print even number and odd function should print odd number.Can it be possible with condition variable? What is the code in both the cases i.e. two separate function and with condition variable.

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C++ :: Calling Functions From Text Files?

Jan 5, 2015

I'm working on a code that reads a text file and follows the instructions written in that file. An example of the text file:

*sum
11 4 61 2
1 2 0 14
17 99 1 1
*subtract
5 6 7
1 1 1
45 6 9

I want to read the text file line by line, each time I find an instruction (that is, the keywords *sum or *subtract) I want to make a summation (in the case of *sum) of all the numbers in each of the following lines, and repeat until the next instruction appear. So the text file above should generate:

78
17
118
-8
-1
30

That is:

11 + 4 + 61 + 2 = 78
1 + 2 + 0 + 14 = 17
17 + 99 + 1 + 1 = 118
5 - 6 - 7 = -8
1 - 1 - 1 = -1
45 - 6 - 9 = 30

how can I implement a dictionary(I'm guessing a dictionary is the best way to go here) so that when I read the string *sum i can call a function that does the summation of the following lines.

the size of the text file may be big (several mb) and the number of different instructions to search for may be in the magnitude of hundreds.

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C/C++ :: Calling Functions Inside A Class?

Nov 4, 2014

Im currently working on a class assignment and the pseudo code containing the instructions that I need to complete list:

//--------------------------------------------------------------------------------------------------------------
// CTOR: Point()
//
// DESCRIPTION
// Default constructor. Initializes the point to be at the origin (0, 0) and the color to black = (0, 0, 0).
//
// PSEUDOCODE
// Call Init() and pass 0, 0, 0, 0, and 0 as the parameters.
//--------------------------------------------------------------------------------------------------------------

My code for this is:

Point::Point(){
void Init(0, 0, 0, 0, 0);
}

The code I wrote for the function Init is here:

Point::Init(int mX, int mY, color mColor){
mX = 0;
mY = 0;
mColor = pInitColor;
}

My problem here is that whenever I try calling this function in the point class, I get an error next to void Init saying incomplete type is not allowed. Also visual studio is telling me that it expects a ')' after my first zero in that line.

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Visual C++ :: Mq4 Platform Calling Functions From DLL

Feb 10, 2013

I have Mq4 platform calling functions from DLL some how it doesnt make any differents when I make the call....

// DLL Code

#define WIN32_LEAN_AND_MEAN
#define MT4_EXPFUNC __declspec(dllexport)
using namespace std;
std::string My_String;
#define stringify(mymonths ) # mymonths

[Code] ....

I call this function

bool counts = StartRulls(bars);
Print("counts =",counts );
2013.02.09 23:03:242010.03.31 16:37 My_Mq4.mq4 EURCAD,M5: counts = 1

My result always stays 1

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C :: Calling Functions From Parallel (MPI) Fortran Program

Apr 24, 2013

I'm working on a parallel Fortran program by using MPI, which calls a very good random number generator function from C (drand48 and srand48 for seed).

My Fortran program file "Par_PICFort_4.f95" is smt. like:

Code: PROGRAM main
IMPLICIT NONE
Include 'mpif.h'

[Code]....

I compile the code as: Code: mpif77 -o PIC Par_PICFort_4.f95 drand48.c Program seem to be running, but after checking the simulation results, I see that drand48 is not working in a parallel way. Creating independent random numbers which different seeds is very important for me.

Question: Is it possible to run the drand48.c file as parallel?

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C :: Calling Functions With Arguments Using Pointer Variables As Operators

Feb 2, 2013

There are, or course, better ways to do this, but I need to stick to some rules:

(1) Use only pointer variables and not arrays or structs.
(2) Use the three functions shown--regardless of easier methods.

The program should ask for some input, operate on those numbers, and then display the results. I know I am confused over these things:

(1) All that syntax using '*' and '&' or neither.
(2) How to use the char type correctly.
(3) How to use a char type input as an operator (a + b).
(4) How to use the pointer of the operator variable (+,-,*,/) in an actual equation.

Code:
#include <stdio.h>
#include <stdlib.h>
// *** Prototype Functions ***
void Post_Results (float*);
void Calculate (float*, float*, char*, float*);
void Get_Numbers (float*, char*, float*);

[Code]......

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C :: Donate Or Invest Into The Fund - Iterations Of A Loop

Sep 20, 2013

Basically I have to write a program where there is a fund and the user sees a display menu

1- Donate to the fund
2- Invest in the Fund
3- Check Fund Balance
4- Quit

And the user can either donate or invest into the fund and its a loop. I have the loop written and working I just can't seem to figure out how to state how many donations or investments were made before the user selected to quit.

I need a final printstatement to say

The final Funds are $______ and there were __ Donations and ___ investments

How to go about counting the iterations and printing it for the user to see.

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C++ :: Program To Calculate Company Weekly Payroll - Calling Functions?

Jun 9, 2014

This program in not completed. I am creating a large program in order to calculate a company's weekly payroll. For now I am filling in the separate functions piece by piece before the rest of the program is completed.

Right now I am trying to use separate functions to call other functions. I need to ask the user for the file name and then open the file. I am no longer getting any compiler errors however when I run the program all it displays is "Welcome."

So it's not actually calling the NameTheFile function and the OpenTheFile function. It just says "Welcome" and then closes down. Why is it doing this?

/*Program to determine company's weekly payroll*/

#include <iostream>
#include <string>
#include <fstream>
using namespace std;
void NametheFile() {

ifstream inputFile;

[Code] ....

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C++ :: Calling Derived Class Functions In A Function With Parameter Of Base Class

Mar 30, 2013

Say 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).

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C/C++ :: How To Access Linked List Functions From Stack Class Without Functions

Mar 20, 2014

I'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]...

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C/C++ :: Array Of Functions Pointing To In Class Functions With Arduino

May 3, 2013

At 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 (*)()'

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C++ :: Calling Subroutines Within DLL

Feb 20, 2013

I am using a dll written in FORTRAN to do some calculations and here is how I have set up the program. I have created following files:

C++ source files:
main.cpp
File1.cpp
Header Files:
Datamain.h
DataFile1.h

[Code]....

Here are my questions:

1) I actually want to call Sub2dll from the main program. But the above program does not build and it gives me the following error: In function 'int main()': Sub2dll was not declared in this scope.

When I build this program with the call to Sub2dll in main commented out and instead put that call in File1::Setup function things build well and runs giving the answer expected. How can I make the call to Sub2dll from main.

2) I am including "Datamain.h" in main. However when I build it with out the declaration int Datamain::Index; in main, it gives me the following error: undefined reference to Datamain::Index When I add that declaration to main the error disappears.

I am usiing Code::blocks with MinGW compiler. I have not put the argument list for the subroutine calls since there were not errors in that part.

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C++ :: Calling Function In DLL

Jun 8, 2014

I have this sample code, that calls a function in a DLL. The function Callback is provided to the DLL as an argument, in order for the DLL to notify my program of relevant changes.

sample:

#include <iostream>
#include <conio.h>
#include <windows.h>
#include <winbase.h>
#include "TcAdsDef.h"
#include "TcAdsApi.h"
 using namespace std;
 void _stdcall Callback(AmsAddr*, AdsNotificationHeader*, unsigned long);
 
[Code] ....

I would like to change this code, so that there is a Main class that opens the connection and there are several separate classes (as below) that register themselves for a specific variable and get notifications if that value is changed. The reason for this is that I want to get several notifications for several independent events and I don't want them to mix. I figured this should look something like this:

class.h
#ifndef INACLASS_H
#define INACLASS_H
 #include "Main.h"
 class InAClass {
    public:
        InAClass(Main* mainClass, std::string iolocation);

[Code] ....

Unfortunately this gives me an error:
error: cannot convert 'InAClass::Callback' from type 'void (InAClass::)(AmsAddr*, AdsNotificationHeader*, long unsigned int)' to type 'PAdsNotificationFuncEx {aka void (__attribute__((__stdcall__)) *)(AmsAddr*, AdsNotificationHeader*, long unsigned int)}'

At first I thought this was because I don't have the namespace "using namespace std;" on top, but then I should be able to find something that specifically needs to come from the std namespace and is not marked as such. I don't want to rule the option out, but so far I could not find anything like that.

An alternative explanation might be that the Callback function needs to be global, but if I make it global, how can I distinguish between several Callback functions?

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C# :: Calling A Class Within Itself?

Apr 12, 2015

I created a simple program to understand it

class TestClass {
private int x = 10;
TestClass a = new TestClass();

[Code].....

I know this is recursion but how do the compiler do this? How can it call itself when it hasnt even completed initializing every object it has? Why do VS allow this?

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C++ ::  Calling All Instances Of Object?

May 28, 2013

So I am wondering how I would go about calling a function for all instances of an object. I tried googling it, but all I saw was solutions like making an array of pointers to the objects. What if I don't know how many objects there will be? Isn't there an easier way?

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C++ :: Calling Char From Function

Aug 3, 2013

Every time I try to use the function SaveNewCD, it doesn't write to file correctly. It writes the ~, three characters, then goes into an infinite loop.

#include<iostream>
#include<fstream>
using namespace std;
int SaveNewCD();
int OpenCD();
int main() {
char ArtistName[25];

[Code] .....

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C++ :: Calling A Function Through A Variable?

Jul 2, 2014

I am trying to call a function through a variable

The error

|error: no match for 'operator=' (operand types are 'std::string {aka std::basic_string<char>}' and 'void')|

|warning: statement has no effect [-Wunused-value]|
||=== Build failed: 1 error(s), 1 warning(s) (0 minute(s), 0 second(s)) ===|
#include <iostream>
#include <fstream>

[Code].....

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C++ :: Ofstream In Calling Function

Apr 3, 2013

I am trying to use ofstream to write in a txt file in a function called recurrently. for a simplified example:

void func_write(double x) {
ofstream myfile;
myfile << "the result = " << x << endl;
} int main() {
ofstream myfile;

[Code] .....

To this stage, it does not work, because the myfile in func_write cannot write in the txt file opened in main function. I don't want to open, append and close the txt file each time the function is called, that will take more time to execute all (imagine with 500 calls).

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C++ :: Calling Array From One Function To Another?

Dec 28, 2013

I want to call the array from one function to another all function not a main function

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C# :: Calling Same Method Twice With Different Output

Dec 24, 2014

Allow users to enter their name and favorite saying in a single method that gets invoked two times. If I can only return one value at a time, how am I suppose to get name and favorite saying out of UserInput()?

static void Main(string[] args) {
string displayName, favoriteSaying;
DisplayInstructions();
Console.WriteLine();//readability

[Code] ....

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