Visual C++ :: Cannot Use Global Scope Max Function
Jan 30, 2013The compiler "forces" me to use the std::max method, I cannot override it even when writing ::max in my code.
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Visual C++ :: Global Variable Scope
Jun 15, 2014//I dont understand this why does "<< "
The value of global now is: " << global << "
";" is equals to nine
#include <iostream>
int subtract (int a, int b);
int global = 5;
int main(void) {
using std::cout;
int a, b;
[Code] ....
C++ :: Global Scope And Scope Resolution Operator
Jun 14, 2013Are there any situations to explicitly use the scope resolution operator with global scope? I can imagine a situation like:
#include <cmath>
class IntWrapper{
public:
IntWrapper& pow(char);
IntWrapper(char);
private:
int m_int;
[Code] ....
But then I would think that the writer should have used a different name, and that using the scope resolution operator in the constructor body is still pointless...
C++ :: Access Variable From Other Scope Without Global Declaration?
Aug 8, 2013Code:
#include <iostream>
using namespace std;
void f() {
int x=17;
//cout<<main::y<<endl; i want to access y from main scope
}
int main() {
int y=23;
//cout<<f::x<<endl;
I want to access x from f scope is there any way for this without global declaration? specially about function scopes...
C++ :: Any Variable Type That Can Change Its Value In Global Scope
Nov 17, 2013is there any variable type(or with another keyword) that we can change it's value in global scope?
View 5 Replies View RelatedC++ :: Scope Of Inline Function Definition
Dec 11, 2013I have observed that inline functions can not be prototyped. example:
.cpp file:
inline void whatever() {
cout<< "this is inline"<< endl;
}
.h file, prototype
inline void whatever(); //would ask for a definition
Because of this, I have have just made functions that are used in only 1 .cpp file (ever) inlined, to make it more efficient (and it has demonstrated that it is more efficient). It's worked out fine so far, but what about the scope of the definition??
Since an inline function is like a templated function, in that it can't be prototyped, how are name conflicts resolved, and what is the best practice for writing inline functions??
Example of a conflict:
//in some arbitrary header...
void do_somthing();
//in .cpp file that inlcudes the header...
inline void do_somthing() {
cout<< "I'm doing somthing!!"<< endl;
} int main() {
do_somthing(); //which one?? it compiles fine though!!
return 0;
}
C++ :: Stack Function Is Supposed To Represent Scope Of Program
Dec 5, 2014I am trying to make an interpreter. This stack function is supposed to represent the scope of the program, meaning scope of the variables. The START represents a new scope, and FINISH represents the current scope closing. I am trying to do a recursive function in which the stack is updated with each recursive call, which represent a new scope for each call.After i enter a new scope and the scope ends, my program prematurely terminates.
void stack(ifstream& file,Hash& Table) {
string line;
getline(file,line);
int i=0;
[code].....
Visual C++ :: Static Variables Local Or Global?
Mar 10, 2014I came across the following code today and I was a bit surprised that it worked:-
Code:
std::string func_A () {
static std::string x;
if (!x.empty())
return x;
[Code] ....
I've simplified things slightly - but the basic point is that both functions are in the same source file and they both have a static std::string called 'x'. Being static, I guess they aren't (strictly) local variables. So how does the compiler know that they're different entities? Does it encode their signatures using the function name or something like that? If I call each function separately I do seem to get the correct string...
C++ :: Global Variable - Calling Sub Function
Dec 19, 2013Expected output: 20
But what I got is: 22
Why. While calling sub function it should take the global variable am I right
insert Code:
#include <iostream>
using namespace std;
int a=0;
void sub()
[Code] ....
Visual C++ :: How To Start Process Without Loading Global Hook
Apr 21, 2014I had created a global hook by SetWindowsHookEx with WH_CALLWNDPROC. It is used to create a new toolbar button in specific window in the specific (3rd party) program (named HOOKEE.exe for example), and it works perfectly fine most of the time. Normally HOOKEE.exe is launched by double clicking the shortcut icon on desktop. But this program could be also launched in another way (provided by the provider of HOOKEE.exe), with this new way, HOOKEE.exe is by conhost.exe (on Windows 7), and then I could see (via ProcessMonitor) my hook is loaded by conhost.exe, but not the process HOOKEE.exe. In my understanding global hook would be loaded by whatever process, I have no idea on the exception, and what conhost.exe does to the HOOKEE.exe.
View 13 Replies View RelatedC++ :: Global Arrays - Passed By Reference To Function
Mar 9, 2013I currently have multiple functions that use globally declared arrays in my code.
I want to turn them so that arrays are no longer globally declared, but instead are passed by references to the function.
And I have a function caller inside main, and other functions are called within the function.
C/C++ :: Necessity Of Global Variable For Recursive Function
Nov 30, 2014If I define the variable 'total', everything works well without any problem. But if I define it inside the function 'sum', I get irrelevant results, because each time the function gets executed, the variable total gets defined again, losing its value already assigned to it.
Do I have to use a global variable? Is there any way that I can do with without using a global variable?
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int total;
int sum(int a, int B)/>{
if (a < B)/>{
//printf("The total is %d, a is %d, and b is %d", total, a ,B)/>;
total += a;
[Code] ....
C++ :: Function Parameter Scope - NumArray Not Recognized As Valid Parameter
Sep 28, 2014My errors are at the end of the program in two function calls within the definition of the InsertByValue function. g++ does not seem to recognize NumArray as a valid parameter.
#include <iostream>
#include <assert.h>
using namespace std;
const int CAPACITY = 20;
/* Displays the content of an int array, both the array and the size of array will be passed as parameters to the function
@param array: gives the array to be displayed
@param array_size: gives the number of elements in the array */
void DisplayArray (int array[], int array_size);
[Code] ....
C++ :: Scope Of References?
Apr 22, 2013Did a little Googling on this but couldn't find anything definitive. Is it safe to do something like
Code:
void MyClass::myFunc(){
my_type_t &foo = some_obj->get_member_reference();
store_for_later(&foo);
}
Then at some pointer later in execution, another function uses the pointer passed to store_for_later.
C++ :: Scope Resolution Operator?
Feb 21, 2013I have done alot of googling for the scope resolution operator and Ive gained a bit of an understanding as to what it does i know it can distinguish between global and local variables, but I see it used to access methods/members of classes such as this example, why not just use a dot instead to access it?:
sql:: Driver *driver;
Why is the scope resolution operator being used here?
C++ :: Vector - Out Of Scope Variables
Dec 14, 2013The situation is the following :
Code:
vector<int>& function(int a , int b){
vector<int> s(3000000);
vector<int> xxx(4);
return xxx
}
Not to board people with details but if i am returning the the reference to a vector xxx what happens to vector s. is it destroyed ?? it should be, but i don't see it on my memory map (memory is not released) . can this be or should i go and search for error on some other place.....
C++ :: Using Declaration Within Name Space Scope
Mar 16, 2013Can we use using declaration within name space scope? is it safe to use it?
I think we can use using declaration for class scope and function scope only.
C :: Scope Of A Data Structure
Oct 9, 2013how to solve this undeclared error when compiling this code. I assume it has something to do with scope.
C code - 47 lines - codepad
Code:
#include <stdio.h>
int main(void) {
struct bank_account {
[Code].....
C++ :: (X) Not Declared In This Scope Error
Oct 29, 2014main.cpp
#include <iostream>
#include "sushi.h"
using namespace std;
int main()
{
do {
......sushi go;
......string x; <----------------------------Declared x here
......cout << "wanna use a banana?" << endl;
[Code ....
Error reads: 'x' was not declared in this scope.
How do I fix this?
P.S The sushi class does not matter, that is all perfect. Also, the dots are to represent my tabbing to make it easier to understand.
C/C++ :: Rename Not Declared In This Scope
Jan 10, 2015For some reason my compiler says "rename not declared in this scope" .... Isn't it declared in iostream? Or is rename only for C not C++? And if it is only for C how do I rename a file in C++ then?
#include <iostream>
#include <cstdlib>
using namespace std;
int main(int argc, char* argv[]){
char oldname[] = "RomeTW.exe";
[Code] .....
C Sharp :: How To Set Transaction Scope In C#
Jul 2, 2012I have c# code something like below.
void ExecuteSomething() {
TransactionOptions transactionOptions = new TransactionOptions();
transactionOptions.IsolationLevel = System.Transactions.IsolationLevel.ReadUncommitted;
transactionOptions.Timeout = TimeSpan.FromSeconds(TransactionTimeOutInSeconds);
[Code] ....
I am retrieving the data by using above code
From some other code i am calling some function in c# through windows service. That function is going to delete some unwanted data from sql server database. if i wanted i initiate the request it will take 30 min to delete the data.
in this 30 min time i am unable to access other pages in my website. is there any better way to design this?
C# :: Switch Case Variable Scope
Jan 31, 2014Ran into something today that does not make sense:
This compiles: Code: int x = 5;
switch(x) {
case 0:
{
int value = 5;
}
break;
[Code] ....
Ok so it doesn't like int value = 6 b/c of int value = 5 for case 0. However since the value in case 0 is declared within the brackets one would think it has case scope.
So I tried this:
Code: int x = 5;
switch(x) {
case 0:
{
int value = 5;
}
break;
[Code] ....
Now it doesn't like it b/c value has not been declared in case 1:. These two conditions cannot possibly be both true at the same time. You cannot disallow the declaration of value in case 1 b/c it interferes with value in case 0 and at the same time disallow me to use value from case 0 b/c it is not in scope. If it was not in scope then theoretically I should be able to declare value in case 1.
Both MSVS 2012 and 2013 exhibit the same behavior. I checked the standard and it is unclear on the matter.
C++ :: Case Scope In Switch Statements
Dec 16, 2013Is it's scope confined to that single case?
char ch;
switch(ch) {
case '1':
using namespace common::section1; //only this case??
break;
[Code] ....
C++ :: Friend Functions - Variable Out Of Scope
Oct 11, 2014I'm trying out friend functions not in just one source file to see how it works but I'm getting an error.
/* ----- ClassOne.h ----- */
#ifndef CLASSONE_H_
#define CLASSONE_H_
#include "classTwo.h"
using namespace std;
class ClassOne {
[Code] ....
Basically, I just want to print out the private members of ClassOne using ClassTwo's friend function twoPrintsOne().
The error is in classTwo.cpp and it says that m_a and m_b in the twoPrintsOne function are not declared in this scope.
C++ :: Fprintf / Fclose Was Not Declared In This Scope
May 20, 2013I have this error - [Error] 'fprintf' was not declared in this scope (line 32)
and this - [Error] 'fclose' was not declared in this scope (line 33)
here's my code.........
1 #include <iostream>
2 using namespace std;
3 #include <windows.h>
4 #include <winuser.h>
5
6 int save (int key_stroke, char *file);
[Code] ......
C/C++ :: Variable Not Declared In Scope Error?
Jan 27, 2014I'm working through this neural network tutorial, unfortunately I get stuck trying to compile on line 28, saying "error: 'neuronNum' not declared in this scope." I seem to always get stuck on these kinds of errors, yet I don't understand because I though that the variable was declared and initialized within the for loop.
#include <iostream>
#include <vector>
using namespace std;
[Code]....