I have the following class in C++: class a { const int b[2]; // other stuff follows // and here's the constructor a(void); } The question is, how do I initialize b in the initialization list, given that I can't initialize it inside the...

What is the best way to initialize a private, static data member in C++? I tried this in my header file, but it gives me weird linker errors: class foo { private: static int i; }; int foo::i = 0; I'm guessing this is because I can't initi...

In order to ensure that some initialization code runs before main (using Arduino/avr-gcc) I have code such as the following: class Init { public: Init() { initialize(); } }; Init init; Ideally I'd like to be able to simply write: initialize(); ...

In order to ensure that some initialization code runs before main (using Arduino/avr-gcc) I have code such as the following: class Init { public: Init() { initialize(); } }; Init init; Ideally I'd like to be able to simply write: initialize(); ...

In order to ensure that some initialization code runs before main (using Arduino/avr-gcc) I have code such as the following: class Init { public: Init() { initialize(); } }; Init init; Ideally I'd like to be able to simply write: initialize(); ...

I'm just beginning to get into C++ and I want to pick up some good habits. If I have just allocated an array of type int with the new operator, how can I initialise them all to 0 without looping through them all myself? Should I just use memset? Is there ...

This is related to some other questions, such as: this, and some of my other questions. In this question, and others, we see we can declare and initialise string arrays in one nice step, for example: const char* const list[] = {"zip", "zam", "bam"}; //f...

I can create an array and initialize it like this: int a[] = {10, 20, 30}; How do I create a std::vector and initialize it similarly elegant? The best way I know is: std::vector<int> ints; ints.push_back(10); ints.push_back(20); ints.push_back...

I need just dictionary or associative array string => int. There is type map C++ for this case. But I need only one map forall instances(-> static) and this map can't be changed(-> const); I have found this way with boost library std::map<int, cha...

In Win32 API programming it's typical to use C structs with multiple fields. Usually only a couple of them have meaningful values and all others have to be zeroed out. This can be achieved in either of the two ways: STRUCT theStruct; memset( &theStru...

C++ Notes: Array Initialization has a nice list over initialization of arrays. I have a int array[100] = {-1}; expecting it to be full with -1's but its not, only first value is and the rest are 0's mixed with random values. The code int array[100] =...

C++ Notes: Array Initialization has a nice list over initialization of arrays. I have a int array[100] = {-1}; expecting it to be full with -1's but its not, only first value is and the rest are 0's mixed with random values. The code int array[100] =...

If 'Test' is an ordinary class, is there any difference between: Test* test = new Test; and Test* test = new Test();

Edited again because it originally wasn't clear that I'm trying to initialize the arrays at compile time, not at run time... I've got the following reduced testcase: typedef struct TestStruct { int length; int values[]; }; TestStruct t = {3, ...

Can someone please explain why pointers aren't initialized to NULL? Example: void test(){ char *buf; if (!buf) // whatever } The program wouldn't step inside the if because buf is not null. I would like to know why, in what case ...

I have just found out that the following is not valid. //Header File class test { const static char array[] = { '1', '2', '3' }; }; Where is the best place to initialize this?

Consider following code: #include <iostream> using namespace std; int main() { int x, y, i; cin >> x >> y >> i; switch(i) { case 1: // int r = x + y; -- OK int r = 1; // Failed to Compi...

My understanding is that an int variable will be initialized to 0 automatically; however, it is not. The code below prints a random value. int main () { int a[10]; int i; cout << i << endl; for(int i = 0; i < 10; i++) ...

Suppose I have a class with private memebers ptr, name, pname, rname, crname and age. What happens if I don't initialize them myself? Here is an example: class Example { private: int *ptr; string name; string *pname; ...

I have a class class foo { public: foo(); foo( int ); private: static const string s; }; Where is the best place to initialize the string s in the source file?