Visual C++ :: How To Call Sleep Function Prototype

Dec 23, 2012

I have two problems with the code below:

1. I cannot find a header file to #include that has the sleep function prototype.

2. When I add my own sleep function prototype, I get an unresolved external reference error (for _sleep, not sleep).

What must I #include to get the sleep function prototype? What lib must I include in the linker configuration to resolve the external reference? (I suspect that if I #include the correct header file, the second question might become moot.)

The "man page" at [URL] .... says the header file is <WinBase.h>. But #include'g only <WinBase.h> results in compilation errors.

A response marked "answer" at [URL] ..... says <windows.h> [sic]. #Include'g only <Windows.h> does eliminate the compilation errors.

But apparently that does not bring in the sleep function prototype. Neither does also subsequently #include'g <WinBase.h>. (Which seems to be #include'd by <Windows.h> anyway.)

But even with my own function prototype shown below, I get an unresolved external reference for _sleep. Is that a symptom of my problem: my sleep reference is changed to _sleep? If so, how can avoid that?

According to "man page" (see link above), the external should be resolve in kernel32.lib. And kernel32.lib does appear in the "Additional Dependencies" list under Configuration Properties Linker Input.

Since I am not using C++ features, I tried setting "Compile as C" under Configuration Properties C/C++ Advanced, to no avail.

My code....

#include "stdafx.h"
#include <stdlib.h>
#include <time.h>
#include <Windows.h>
void sleep(DWORD msec); // added later
int _tmain(int argc, char* argv[])

[Code] ....

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C++ :: Header And Prototype Correct But No Matching Function For Call To?

Dec 10, 2014

For whatever reason, I get an error meassage about lines 53-57 saying there is no matching function to call to. Yet the header and the prototype are correct (I think anyways).

#include <iostream>
#include <string>
#include <fstream>
#define N 10
using namespace std;
class cust{

[Code] ....

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Visual C++ :: What Header For Sleep Function

Jan 26, 2014

I have been googling for a long time to find the header used with sleep().

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Visual C++ :: Drawing Analog Clock - Sleep Function

Jan 19, 2015

The question says: Make an "analog clock" that is, a clock with hands that move. You get the time of day from the operating system through a library call. A major part of this exercise is to find the functions that give you the time of day and a way of waiting for a short period of time (e.g., a second for a clock tick) and to learn to use them based on the documentation you found. Hint: clock(), sleep().

OK, I wrote below code. It is in its primary stages and has not been completed yet.

Code:
#include <GUI.h>
#include <time.h>
#include <iostream>
using namespace Graph_lib;
//---------------------------------
class Dynamic_clock : public Window {

[Code] .....

I expect the system in void clock_hands() (line 38) attaches hour1 (line 41) then waits for 1000 ms (using Sleep(1000)) then detaches hour1 and attaches hour2 this time. But it doesn't occur in practice. When the system reaches Sleep(1000); it seems to go into a comma! It doesn't show the hour1 so seeing the movement of clock ticks by the clock's hands will not be possible.

[URL] ....

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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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Visual C++ :: Notification Supposed To Be Sent Out During Forced Sleep In XP?

Oct 2, 2012

I run the following API to put Windows XP SP3 into sleep (or standby mode) from a worker thread:

Code:
BOOL bForced = TRUE;
SetSuspendState(FALSE, bForced, FALSE);

Then in the main thread, while processing window messages:

Code:
LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam) {
if(message == WM_POWERBROADCAST) {
if(wParam == PBT_APMSUSPEND) {
AddLogMsg(_T("SUSPEND event received"));

[Code] ....

So when SetSuspendState is called with request for a 'forced' sleep mode, the PBT_APMSUSPEND notification is never broadcast. Only if I set forced parameter to FALSE I receive it.

PBT_APMRESUMEAUTOMATIC is received in either case.

PBT_APMSUSPEND is always received when run on Windows Vista/7.

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Visual C++ :: DoModal And Call Function

Sep 20, 2012

I have a window I am opening from the parent Dialog by using DoModal:

CMyDlg dml;

dml.DoModal;

When the window opens I want it to run a function on open. Lets just for example say copy files and show a progress bar. Where can I put the function call so that when DoModal is called that function will execute?

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C++ :: Sleep Function When Drawing Analog Clock

Jan 19, 2015

Make an "analog clock" that is, a clock with hands that move. You get the time of day from the operating system through a library call. A major part of this exercise is to find the functions that give you the time of day and a way of waiting for a short period of time (e.g., a second for a clock tick) and to learn to use them based on the documentation you found. Hint: clock(), sleep().

OK, I wrote below code. It is in its primary stages and has not been completed yet.

#include <GUI.h>
#include <time.h>
#include <iostream>
using namespace Graph_lib;

[Code] .....

I expect the system in void clock_hands() (line 38) attaches hour1 (line 41) then waits for 1000 ms (using Sleep(1000)) then detaches hour1 and attaches hour2 this time. But it doesn't occur in practice. When the system reaches Sleep(1000); it seems to go into a comma! It doesn't show the hour1 so seeing the movement of clock ticks by the clock's hands will not be possible.

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Visual C++ :: Value Of ESP Was Not Properly Saved Across A Function Call

Sep 22, 2012

I'm working with a cross-platform library which defines a function to obtain function addresses from a shared object (i.e. a DLL on Windows). Here's my modified version of the function which works (albeit only on Windows of course):-

Code:
typedef void (*SuilVoidFunc)(void);
/** dlsym wrapper to return a function pointer */
static inline SuilVoidFunc
suil_dlfunc(void* handle, const char* symbol) {
return (SuilVoidFunc)GetProcAddress((HMODULE)handle, symbol);
}

Now, here's the original (cross-platform) version which is giving me a run time error on Windows:-

Code:
typedef void (*SuilVoidFunc)(void);
#define dlsym GetProcAddress
/** dlsym wrapper to return a function pointer */
static inline SuilVoidFunc
suil_dlfunc(void* handle, const char* symbol) {
typedef SuilVoidFunc (*VoidFuncGetter)(void*, const char*);
VoidFuncGetter dlfunc = (VoidFuncGetter)dlsym;
return dlfunc(handle, symbol);
}

That original version fails at the final return line. The error message says "The value of ESP was not properly saved across a function call".

I'm assuming there's a problem with the declaration of VoidFuncGetter (i.e. it'll assume that the caling convention for GetProcAddress() is cdecl when in fact, it's stdcall). What's the most elegant way to fix this and still keep cross-platform compatibility?

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C++ :: Does Prototype Of Friend Function Has No Value?

Mar 30, 2013

[URL] ..... Prototype is commented.

[URL] ..... Prototype is included.

both give the correct output. Why?

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Aug 25, 2014

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main() {
int i=1,j=2;
float k,l=1.5;

[Code] ...

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C++ :: Type Signature For Function Prototype

Mar 30, 2013

The function im having problems with takes an array where each element is an array of unsigned chars i.e. octals representing a bitmap of one of 95 ASCII code characters and searches through this two dimensional array looking for a match for a predetermined of array of unsigned chars i.e. the bitmap of a predetermined char. If we find the char the function outputs the index in the two-dimensional array where each elem. is an array of octals ELSE it return -1 i.e. when the char is not found.

I have 2 files, one .cpp, the other .h. There is a function named find_char. See INPUT and OUTPUT on line 48 in .cpp file.

The exception im getting is: font2.cpp:23:45:error: invalid conversion from unsigned char to unsigned char(*)[5]

The input type specified for my function prototype corresponding to find_char. If I put just unsigned char it doesn't fix the problem because it's an array parameter i.e. like a call by reference. I've lead myself to believe that the array variable contains a pointer to the first value in the array and so I've made function prototypes that work with a T* i.e. a pointer to type T. Making the function prototype argument unsigned char* i.e. a pointer to unsigned char simply gives me the exception: "invalid conversion from unsigned char to unsigned char*". When I have the argument be 'unsigned char' I get undefined reference to find_char(unsigned char). URL.....

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C++ :: Switching Function Prototype To Another Type

Mar 29, 2014

This is my code:

#include<iostream>
#include<string>
using namespace std;
int bin2dec(const string binarystring); // Declaration of bin2dec prototype with one string parameter
int main() {
cout << "Enter Q to terminate program.

[Code] .....

Right now the code is in the form of a 'const string binarystring' and were supposed to be able to use 'const char binarystring[]' and for some reason whenever i try to switch it i run into problems when referencing the main function to the int bin2dec(...) function.

I wanted to know if theres a simple way to switch the prototype to an array type of function with [] without changing the entire code.

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Aug 20, 2014

Let's first take the following class prototype:

#include <ctime>
#include <iostream>
#include <sstream>
#include <string>
#include <fstream>
class Debugger;
class Debugger {

[Code] ....

My question is regarding the GetCurrentDebugLevel function above. Ideally I would like to use just one function to get the current debug level of the class, the std::string form would be used to save the "debugging level" in a settings file and the enumerated version would for evaluation purposes throughout the program.

My question is if implementing function prototypes by return value the best way to go or should I do something else?

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C++ ::  How To Initialize Function Prototype Of Array With Zero

Apr 23, 2014

We can initialize normal function prototype's parameters with zero like this:-

void output(float = 0.0, int = 0);

or

void output(int = 0, int = 0, double = 0.0);

But how do you do the same for a pointer array or simply an array?

Assume that second parameter has to be an array.

I have tried the following and it does not work:-

void output(float = 0.0, int = 0);
void output(float = 0.0, *int = 0);
void output(float = 0.0, int* = 0);
void output(float = 0.0, int[] = 0);
void output(float = 0.0, int []);

But if I skip the default declarations altogether, it works.

like:

void output(float, int []);

or

void output(float, int*);

how can I do it by explicitly writing zero, just like the first cases?

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May 22, 2013

#include<iostream.h>
#include<conio.h>
int main() {
setcolor(BLUE);
setbkcolor(yellow);
cout<<"the text in blue colour with yelow background";
getch();
return 0;
}  

it keeps returning the same error always in my turbo c++ compiler . What is the correct program for changing background colour and text colour ...

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Apr 25, 2014

What is Function call Overhead and Function Call Stack?

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Dec 6, 2014

what should be the prototype for the following function.

Code:void addition(int x, ...);

I am getting compilation errors. I have written the prototype as :

Code: void addition(int, va_list);

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C :: Variably Modified Type - Function Prototype

Mar 24, 2013

Variably modified types are subject to certain restrictions , just as variable-length arrays are. The most important restriction is that the declaration of a variably modified type must be inside the body of a function or in a function prototype.

Code:
void f(int m , int n) {
int a[m][n] , (*p)[n];
p=a;
//....
}

What does it mean? That we can't declare such a pointer as a global variable?

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C :: Prototype Function Square Root Velocity

Mar 30, 2013

I am trying to computed the time it takes for a projectile to hit the ground. The problem is that i need to square the input of velocity before i do the calculation. the question I have is that if it's possible to have multiple arguments inside the brackets after main.

#include <stdio.h>
#include <math.h>
double distance (double a, double v, double g);
int square(int y);
double height(double v, double a, double g);
double time (double v, double a, double g);
double sqrt(double num);

[Code] ....

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Dec 4, 2014

How to how to make a function prototype that uses variables by reference. I'm making a decision based game where two running totals of two variables (ending and morality from decisions made) will decide the game outcome. I only have a few modules put in so far and most of the "story" parts cut down here to save space. I'm also getting an error saying there is more than one instance of overloaded function for the "whatToDo" module.

// ZombieGame.cpp : Defines the entry point for the console application.
//
#include <stdlib.h> /* srand, rand */
#include <time.h> /* time */
#include <iostream>
using namespace std;
//These are function prototypes to declare the functions being used
void WakeyWakey();
void TwentyMinsLater(int);

[Code] .....

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Apr 9, 2013

I am quite new to C programming. Now facing lots of problem with the code below. I attempt to convert he alphabet sorting into function prototype model but still facing warning during compilation.

Besides, I wish to open multiple file at the same time as well using array looping method, but got no idea to modify it...

[URL] ....

Code:
#include <stdio.h>
#include <string.h>
#define SIZE 255
#define LEN 31

// Function prototype
void alphabetisation (int final, char *webaddress[]);

[Code] .....

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Apr 10, 2014

Consider the class specification below. Write the prototype (i.e. header) of a member function to overload the insertion operator (i.e. <<). The << operator is to output the data members of an instance of class StudentTestScores into an output stream. Your definition should allow for chaining of output operations (e.g. cout << x << y; where x and y are of type StduentTestScires).

#include <string>
using namespace std;
class StudentTestScores{
private:
string studentName;
float *testScores; // used to point to an array of test scores
int numTestScores; // number of test scores

[code]....

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Oct 28, 2013

so in declaring a display function prototype only that displays a student test scores in the format (student name tab number of scores tab test scores )

is this right?

#ifndef STUDENTTESTSCORES_H
#define STUDENTTESTSCORES_H
#include <string>
using namespace std;
class StudentTestScores{
private:

[Code]...

and also how do we call the display function if it is in a class from the header file onto the main cpp file.

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Oct 24, 2014

My instructor mentioned using function in other function.

int test(double abc(double)){
// ... .....
double abc(double n){
// function main
}
as parameter

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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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