C++ :: Accessor Function Paradigm - Set Value

Dec 14, 2013

class foo {
int val;
public:
int val() const { return val; } // get val
int& val() { return val; } // modify val

[Code] ....

I've almost always done something like foo.setVal(20). Saw some code doing it the other way and I was intrigued. What's everyone's opinion on the former paradigm?

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C++ :: Smart Accessor Function For Multiple Data Containers?

Mar 14, 2012

Suppose I'm writing a program designed to simulate a large company. I'm interested in tracking each company employee by the location where they work. This company has perhaps a thousand different locations:

class Employee {
public:
AccessorFunction1(); // does something
AccessorFunction2(); // does something different
AccessorFunction3(); // does something completely different
protected:
// Some data

[code]....

Once employees are created and pointers to them are saved in the proper Location vector, I write an accessor function, OrganizeLocation(), designed to do a number of operations on a given vector. The problem is, I have maybe a thousand vectors. How do I call this function and specify which vector I want?

Currently, I'm using this clunky solution:

void Company::OrganizeLocation(int a){
switch(a) {
case 1: {
for(unsigned int i=0; i<LocationA.size(); i++) {
LocationA[i]->AccessorFunction1();
LocationA[i]->AccessorFunction2();
LocationA[i]->AccessorFunction3();

[code]....

The key point here is that whichever vector I choose to operate upon, I'll do the exact same procedure every time. I hate this solution because it results in very long and repetitive code not to mention its very error-prone when you re-editing all those "LocationA 's into "LocationB/C/D/etc."

void Company::OrganizeLocation( string $WhichOne$ ){
for(unsigned int i=0; i<LocationA.size(); i++) {
Location$WhichOne$[i]->AccessorFunction1();
Location$WhichOne$[i]->AccessorFunction2();
Location$WhichOne$[i]->AccessorFunction3();
}

Or, if it can't be done in C++, is there a better design approach? Ultimately I need the Company object to hold multiple vectors but use one compact accessor function to perform operations on just one of them.

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C++ :: Syntax Error In Function Call - Type Mismatch In Parameter In Function Sort

Jul 6, 2014

error says "cannot convert 'int*' to 'int' in function main()
and also
type mismatch in parameter in function sort(int,int)

Heres the code:
#include<iostream.h>
#include<conio.h>
void main() {
void sort(int,int);
clrscr();

[Code] .....

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C :: Function That Will Work For Both Dynamic And Static Implementations Of A Function To Get Transverse Of Matrix

Feb 11, 2013

i need a function that will work for both dynamic and static implementations of a function to get the transverse of a matrix. so far, i have this

Code:

matrix transpose(matrix m)
{
int row, col;
row = m.com_dim;
col= m.row_dim;
}

[code]....

this works well with my static implementation, but when i try it in dynamic it gives me errors. the function has to be the same for both dynamic and static implementation

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C++ :: Keyboard Function That Is Called In Main Function To Make Shape Move

Jan 19, 2013

Ok so I am working on a game and I'm in the process of developing my Player class. Anyways, what I have is a keyboard function that is called in my main function to make a shape move.

void myKeyboardFunction(unsigned char key, int x, int y) {
switch ( key ) {

[Code].....

But when I try to call it, trying to copy my previous method,

glutKeyboardFunc(Player1.playerControls);

I get an error

error C3867: 'Player::playerControls': function call missing argument list; use '&Player::playerControls' to create a pointer to member

I get an error saying it can't convert parameters. I would just like to understand why the arguments become a problem when I make the function a member of my class, when the first method I used is so easy.

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Visual C++ :: Error C3867 Function Call Missing Argument List For Calling Thread Function

Mar 19, 2013

I searched the web for error: C3867... and the discussions where murky or obscure.

My code excerpt is:

#pragma once
#include <windows.h>
#include <stdlib.h>
#include <process.h>
void PutUpfrmIO(void *);
namespace WordParsor {

[Code] .....

I get the generic message:

error C3867: 'WordParsor::Form1::PutUpfrmIO': function call missing argument list; use '&WordParsor::Form1::PutUpfrmIO' to create a pointer to memberc:userskingc++wordparsorwordparsorForm1.h... and the suggestion fix generate another error.

One person suggested the gcroot<> object wrapper... but I do not know how to modify/declair the function or its argument type.

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C :: Reverse Function That Inserts And Prints Binary Function Correctly

Nov 3, 2013

I have written a function that inserts and prints a binary function correctly.

For example a tree like this [URL] ..... would print like this

Code:
node: 10
node: 7
node: 6
node: 8
node: 9

[Code] ....

Here is my print function

Code:
void prt_tree(struct node *tree) {
if (tree == NULL) {
printf("Null Tree
");
return;

[Code] .....

Could I just make some adjustments to my function to reverse it? and if so, how?

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C++ :: Pass 2 Arrays Into Void Function And Return Values To One Function?

Feb 12, 2014

I'm trying to pass 2 arrays into a void funtion, and return values to one function.

this is the the program I'm working with, after I'm done I have to split it into 3 files, a header, a main, and a separate cpp file for the functions to live in.

#include <iostream>
using namespace std;
void processArrary(int numberCount[], int Numbers[], int intnumberSize, int numberCountSize);
int main() {
int Scores[26] = {76, 89, 150, 135, 200, 76, 12, 100, 150, 28, 178, 189, 167, 200, 175, 150, 87, 99, 129, 149, 176, 200, 87, 35, 157, 189};
int numberCount[8] = { 0 };

[code]...

The goal of this program is to separate and count the groups of numbers then output the amount of numbers in each group. Near as I can tell, everthing should work, but I'm getting all zeros to be displayed in each group.

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C :: Main Function Does Not Return Any Values When Calling Other Function?

Jun 9, 2013

The function is supposed to return value from the file in my main, but I am getting empty value. I am trying to get better with pointer. Right now just teaching myself.

right now the only way for this code to show value is when in put the putchar(*ps) inside my readfile function. I would like to readfile to return value and print in the main function.

Code:

#include <stdio.h>
char *readfile(char filename[]);
int main(int argc, char *argv[] ) {

[Code].....

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C++ :: Calling Base Function From Derived Overloaded Function

Nov 10, 2014

Here is a sample of my question

class Base{
public:
int getNum();
private:
int numToGet;
}
class Derived: public Base {
public:
friend ostream& operator<<(ostream& output, const Derived &B);

[Code]...

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C++ :: Passing 2 Dimensional Array Through Median Function To One Of 2 Other Function

Aug 20, 2013

I want to use one median function "selectfunction" to choose one of the 2 other functions at random to pass my 2-dim array to the selected function. There is a problem in the median function

#include <iostream>
#define random(x)(rand()%x) // for random number between numbers of 0 and 1
using namespace std;
void proc1 (int iArray[][2]);
void proc2 (int iArray[][2]);
void selectfunction(int iArray[][2]);
int A[4][2] = {{1, 2} , {3, 4} , { 5, 7} , {8, 1} };

[Code]...

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C++ :: Using Template Function Inside Class In Separate Function?

Mar 26, 2014

i want to use a class to print data stored as vector or array with different data types. i also want the print function two take more than one vector or array or combination of both so that they can be written to file as two columns. so i wrote the following class:

right now it has only one member function for printing two vectors. later i'll add additional functions as required.

note: there has to be template functions inside the class
i also want the object to be global so that i need not pass it as an argument to other calling functions

class printdata
{
public:
template<typename T1,typename T2>
void SaveData( vector<T1> &data1,vector<T2> &data2, std::string var)
{

[Code]....

then i want to call this template function in another ordinary function written in a seperate cpp file

these function declarations are put in a header file. so i need know whether i should put the declaration of the template function in the header to use the function in different functions

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C++ :: Calling Function By Sending Char Text Of Function Name

Feb 19, 2014

Is this possible?

int myfunc( int a, int b, char * c )
char a = "(int)myfunc()";
char b = "(int,int,char*)"
call(a, b, ...) // Function name and return type, params

I want to do function what registers forward what will get callback if the time is right. Basically then i dont need to edit and add extra functions into source files. I just have to include header and use register forward function. If there is anything close to this it would be perfect!

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C/C++ :: Using Template Function Inside A Class In Separate Function?

Mar 26, 2014

i want to use a class to print data stored as vector or array with different data types.

i also want the print function two take more than one vector or array or combination of both so that they can be written to file as two columns.so i wrote the following class:

right now it has only one member function for printing two vectors. later i'll add additional functions as required.

note: there has to be template functions inside the class / i also want the object to be global so that i need not pass it as an argument to other calling functions

class printdata {
public:
template<typename T1,typename T2>
void SaveData( vector<T1> &data1,vector<T2> &data2, std::string var){
std::ofstream myfile;
std::string filename;

[code].....

then i want to call this template function in another ordinary function written in a seperate cpp file these function declarations are put in a header file. so i need know whether i should put the declaration of the template function in the header to use the function in different functions.

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C/C++ :: How To Hook Function From Same Process And Get Address Of Caller Function

Apr 27, 2013

I need to do it to avoid calling a function of my process from injected code.

So would like to hook this function to check whether the call is from the current module or it is from an external module, then I compare the address of the instruction who did the call with the module address range.

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C++ :: Retrieving File Object From Function Then Pass To Another Function?

Jun 27, 2014

I would like to have 2 functions. (FYI, I haven't even tested these because I don't have a compiler on this PC, so don't know what they'll do. I'm also new to C++, self-teaching.)

My question is, I'm sure that oFile should be type object (of some sort), not int, but I'm not sure how to reference it correctly so that it passes from FileOpen to main to FileClose.

Code:
#include <iostream> //I/O
using namespace std;
#include <fstream> //files
using namespace ios;
int FileOpen(string fileName) {
ifstream oFile (fileName); //attempt to open file

[Code] ....

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C :: Function Name To Wrap Standard Strncpy Function

Nov 5, 2014

I need a function like strncpy; but, want to be sure the destination ends with a ASCII nul char.

So, I wonder what name is used by others in this case.

I have found strlcpy and it looks like a good name choice. [URL] ....

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C :: How To Pass Main Function Argument To Some Other Function

Dec 26, 2014

I am writing a program in which a Fucntion has to be wriiten to parse the Command Line . When I include Code for parsing in main fuction iteslf ,its run ok . But I want to make a fucntion of that code and call it from main ,than it show Segmentation error .

By using Debugging I found Some thing is mess with " -m" Parameter of Command line , But Cant Rectify it ..

Code:
int main (int argc, char *argv[]){
//get_parameter_value(argc,argv);
// buffer[packet_size+1]= char ("'");
while (argc > 1) {
if (argv[h][0] == '-')

[Code] .....

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C++ :: Template Function Don't Work As Inline Function?

Mar 8, 2014

I have this:

string input;
unsigned short choice;
...
istringstream valid(input);
...
if(!(valid >> choice))
{
//some error
}

Ok. My code is almost 1000 lines, and I have splited some functions in headers. But the same function doesn't work:

template <typename T> bool valid_input(const string& input, T var)
{
istringstream valid(input);
return (valid >> var);
}

You can check it here: [URL] The output is correct, but in my machine with C++11, MinGW 4.8 (64 bit in a 64bit-Windows8), the output is incorrect. Why?

If you want more specific info, the problem is that I use input, I think. I use std::getline(std::cin, some_string).

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C++ :: Translating Recursive Function Into Iterator Function

Nov 27, 2014

How do I change the following recursive function into a iterator function and basically what should it look like?

int f(int i) {
if(i<2)
return i;
return f(i-2)+f(i-1);
}

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C++ :: Changing Recursive Function Into Iterator Function?

Nov 29, 2014

I had the following question in my exam and received 3 out of a possible 4 marks

Here is the question:

Assume the following recursive function:
int f(int i)
{
if(i < 2)
return i;
return f(i - 2) + f(i -1);
}

Translate this function into an iterative version:

Here is my solution:

int f(int i)
{
int prev,next,final;
prev = 0;

[Code]....

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C/C++ :: How To Get Formation From Pointer Function To Main Function

Feb 13, 2014

int example (int [], int, *int,*int,*int,*int);
int main () {
My code will be here
example (int array[], int size, &a,&b,&c,&d); // Like this??? I try it didnt work

[Code] ....

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C/C++ :: Changing Recursive Function Into Iterator Function

Nov 30, 2014

I am trying to translate the following recursive function into its iterative function:

int f(int i)
{
if(i < 2)
return i;
return f(i - 2) + f(i -1);
}

This is what I tried to do:

int f(int i)
{
int prev,next,final;
prev = 0;
next = 1;
if(i==1)
final = i;

[Code] .....

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C/C++ :: Changing Recursive Function Into Iterator Function?

Nov 30, 2014

I am trying to translate the following recursive function into its iterative function:

int f(int i) {
if(i < 2)
return i;
return f(i - 2) + f(i -1);
}

This is what I tried to do:

int f(int i) {
int prev,next,final;
prev = 0;
next = 1;

[Code] ....

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C :: Dynamic Array From Function To Function

Oct 19, 2014

my program is just counting the maximum of the array, however, I'd like to do that with the dynamic array (with pointers).

Code:

#include <stdio.h>
#include <stdlib.h>
void ArrayScan(int n, int *h);
void ArrayMaximum(int n, int *h, int x);
int main()
}

[code]....

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C++ :: Call Of Non-function In Function Main

Feb 16, 2013

I am getting call of nonfunction in function main <> error and 's' is assigned a value that is never used in the function warning...

#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
int main() {
float a,b,c,s,area;

[Code] ....

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