Const Multi-Dimentional Array Member Variable

[NvrBst]

I'd like to do something like this but having a problem with the
proper syntax in the constructor, maybe someone knows the correct
syntax?

---MyClass.h---
#ifndef MYCLASS_H_
#define MYCLASS_H_

class MyClass {
public:
MyClass();
virtual ~MyClass();
private:
const char* const m_navi[1][1];
};

#endif /*MYMENU_H_*/
----------

---MyClass.cpp---
#include "MyClass.h"

MyClass::Myclass() {
m_navi = { {"1"} };
}

MyClass:~MyClass() {
}
----------


1. I get an "expected ';' before '{' token" error at the "m_navi = {"
line. I also get an "uninitalized member "Myclass::t" error.
2. If I change "m_navi = {" to "MyClass::m_navi = {" I get the same
errors as "1.".
3. I've tried declaring it in the header file directly (const char*
const m_navi[1][1] = { {"1"} } and get an "a brace-enclosed
initializer is not allowed here before '{' token" error.
4. I've tried making it static (static const char* const m_navi[1][1]
= { {"1"} } and get the same errors as "3."
5. If I move the (const char* const m_navi[1][1] = { {"1"} } into
the "main.cpp" file (above the "int main() {" line) then it compiles
fine and I can use it fine in the main function.

Question: Whats the proper way to assign the (const char* const m_navi
[1][1]) inside the constructor? Assuming the above "MyClass.h" and
"MyClass.cpp" files? Thanks

Note: The member variable can be static if that makes it easier; the
data inside "m_navi" never changes once it is set, and there is only
one instance of "MyClass" ever created; I would like to set the value
inside the constructor though if possible since values in "m_navi"
potentially gets updated between builds, so I'd only have to change
the ".cpp" file, but this isn't 100% nessisary.

I'm using Eclipse 3.2.2, on a Ubuntu 8.10 Machine. g++ Version
"4.2.4". Thanks.

 

[Adem]

I'd like to do something like this but having a problem with the
proper syntax in the constructor, maybe someone knows the correct
syntax?

---MyClass.h---
#ifndef MYCLASS_H_
#define MYCLASS_H_

class MyClass {
public:
MyClass();
virtual ~MyClass();
private:
const char* const m_navi[1][1];
};

#endif /*MYMENU_H_*/
----------

---MyClass.cpp---
#include "MyClass.h"

MyClass::Myclass() {
m_navi = { {"1"} };
}

MyClass:~MyClass() {
}
----------


1. I get an "expected ';' before '{' token" error at the "m_navi = {"
line. I also get an "uninitalized member "Myclass::t" error.
2. If I change "m_navi = {" to "MyClass::m_navi = {" I get the same
errors as "1.".
3. I've tried declaring it in the header file directly (const char*
const m_navi[1][1] = { {"1"} } and get an "a brace-enclosed
initializer is not allowed here before '{' token" error.
4. I've tried making it static (static const char* const m_navi[1][1]
= { {"1"} } and get the same errors as "3."
5. If I move the (const char* const m_navi[1][1] = { {"1"} } into
the "main.cpp" file (above the "int main() {" line) then it compiles
fine and I can use it fine in the main function.

Question: Whats the proper way to assign the (const char* const m_navi
[1][1]) inside the constructor? Assuming the above "MyClass.h" and
"MyClass.cpp" files? Thanks

Note: The member variable can be static if that makes it easier; the
data inside "m_navi" never changes once it is set, and there is only
one instance of "MyClass" ever created; I would like to set the value
inside the constructor though if possible since values in "m_navi"
potentially gets updated between builds, so I'd only have to change
the ".cpp" file, but this isn't 100% nessisary.

I'm using Eclipse 3.2.2, on a Ubuntu 8.10 Machine. g++ Version
"4.2.4". Thanks.

You have a typo in your source ("Myclass" vs. "MyClass")
One of the possible solutions would be the following:

// in header file:
class MyClass
{
public:
MyClass() {}
virtual ~MyClass() {}
private:
static const char* const m_navi[1][1];
};

// the following must not be placed in the header file:
const char* const MyClass::m_navi[1][1] = { { "1" } }; // static init

int main()
{
MyClass m;
return 0;
}

 

[NvrBst]

I'd like to do something like this but having a problem with the
proper syntax in the constructor, maybe someone knows the correct
syntax?

---MyClass.h---
#ifndef MYCLASS_H_
#define MYCLASS_H_

class MyClass {
public:
   MyClass();
   virtual ~MyClass();
private:
   const char* const m_navi[1][1];
};

#endif /*MYMENU_H_*/
----------

---MyClass.cpp---
#include "MyClass.h"

MyClass::Myclass() {
   m_navi = { {"1"} };
}

MyClass:~MyClass() {
}
----------

1.  I get an "expected ';' before '{' token" error at the "m_navi = {"
line.  I also get an "uninitalized member "Myclass::t" error.
2.  If I change "m_navi = {" to "MyClass::m_navi = {" I get the same
errors as "1.".
3.  I've tried declaring it in the header file directly (const char*
const m_navi[1][1] = { {"1"} } and get an "a brace-enclosed
initializer is not allowed here before '{' token" error.
4. I've tried making it static (static const char* const m_navi[1][1]
= { {"1"} } and get the same errors as "3."
5. If I move the (const char* const m_navi[1][1] = { {"1"} } into
the "main.cpp" file (above the "int main() {" line) then it compiles
fine and I can use it fine in the main function.

Question: Whats the proper way to assign the (const char* const m_navi
[1][1]) inside the constructor?  Assuming the above "MyClass.h" and
"MyClass.cpp" files?  Thanks

Note: The member variable can be static if that makes it easier; the
data inside "m_navi" never changes once it is set, and there is only
one instance of "MyClass" ever created; I would like to set the value
inside the constructor though if possible since values in "m_navi"
potentially gets updated between builds, so I'd only have to change
the ".cpp" file, but this isn't 100% nessisary.

I'm using Eclipse 3.2.2, on a Ubuntu 8.10 Machine.  g++ Version
"4.2.4".  Thanks.

You have a typo in your source ("Myclass" vs. "MyClass")  
One of the possible solutions would be the following:

// in header file:
class MyClass
  {
    public:
      MyClass() {}
      virtual ~MyClass() {}
    private:
      static const char* const m_navi[1][1];
   };

// the following must not be placed in the header file:
const char* const MyClass::m_navi[1][1] = { { "1" } };   // static init

int main()
  {
    MyClass m;
    return 0;
  }

Thank you That worked dandily. I think I got mixed up since I
kept trying to do it in either the header file, or the ctor. Thanks
once more.

 

[NvrBst]

Another Initialization Question if Possible; Kind of relates to the
top. Is there a short hand way to initializat during a new operator?
For example I can do the following:


----- CAN DO -----
const char** FSETUP[2] = {
new const char*[2],
new const char*[4]
}
int main() {
FSETUP[0][0] = "T1";
FSETUP[0][1] = "T2";
//ETC
return 0;
}

----- WOULD LIKE TO DO BUT ERRORS -----
const char** FSETUP[2] = {
new const char*[2] {"T1","T2"},
new const char*[4] {"F1","F2","F3","F4"}
}
int main() {
return 0;
}


It has to stay a jagged array. All examples online I find intalizae
the jagged array the long way, is there a short way to set it when it
is being initialized? The error is "Expected ';' before '{'")