I have got 2 cpp files & a header file, which I have included in both cpp files. It's like this: abc.h extern uint32_t key; a.cpp #include "abc.h" uint32_t key; int main { ............. } b.cpp #include "abc.h" int main { printf("Key: %.8x\n", key); ............. } Now when I compile a.cpp, there is no error. but when i compi...
Do you know the guide how to compile extern libraries and source codes into one file with netbeans ? ...
I have these line in my pro*C program. The function initAerage is defined in a C language and I am trying to call this function in a .pcc (pro C++) file. I am getting an error Error: initAverage(int i);was declared before with a different language extern "C" { int initAverage(int i); } Please help ...
Possible Duplicate: Use the keyword class as a variable name in C++ In a C header file of a library I'm using one of the variables is named 'new'. Unfortunately, I'm using this library in a C++ project and the occurence of 'new' as a variable names freaks out the compiler. I'm already using extern "C" { #include<...> }, but th...
I wonder about the use of the static keyword as scope limiting for variables in a file, in C. The standard way to build a C program as I see it is to: have a bunch of c files defining functions and variables, possibly scope limited with static. have a bunch of h files declaring the functions and possibly variables of the corresponding...
Hi guys, this is my first question on stack overflow, so be gentle. Let me first explain the exact behavior I would like to see. If you are familiar with C# then you know that declaring a variable as "readonly" allows a programmer to assign some value to that variable exactly once. Further attempts to modify the variable will result in ...
#include <iostream> using namespace std; extern int i; int main() { i=10; cout<<"the value of i is"<<i<<endl; } ...
I've got a DLL that I've created as a C++ Win32 application. To prevent name mangling in my DLL, I have used the EXPORT definition defined below: #ifndef EXPORT #define EXPORT extern "C" __declspec(dllexport) #endif EXPORT int _stdcall SteadyFor(double Par[], double Inlet[], double Outlet[]); To get this code to compile, I had to go ...
Hello, I've built a static library, to be linked in my iPhone apps. This library uses some global variables and functions, like in C. My problem is, when using for example: extern void do_stuff (const int a) { return a*a; } extern const int a_variable; extern const int an_array[DEFINED_VALUE]; When I use this function, or access...
Hi All, I'm having a hard time writing makefiles. I have experience in using the extern variables, when I build the project without using makefiles I get absolutely no errors and I can run the program. But from the time I wrote the makefile to build the project, I'm getting undefined reference to errors. I have more than 3 files with ...
Hey all, I'm a bit confused now. I thought that when you used extern on a function, it would become global to everything, but it doesn't seem so... What I want right now, is to have some set of functions that I can use in my static library and in the program that links it. How do I that? I'm using Objective-C ...
I have a struct defined in a header as follows: #define LC_ERR_LEN 300 typedef struct dLC_ERRMSG { short nr; short strategy; char tx[LC_ERR_LEN]; } LC_ERRMSG; Which I use in my code as such: LC_ERRMSG err; char *szError; szError = strerror(sStatus); snprintf(err.tx,LC_ERR_LEN," %s - %s",szFilename,szError); /* do something w...
How can you check if a constant is set at runtime? For instance, in iOS 4, UIApplicationDidEnterBackgroundNotification is available, but when running on iOS 3 it will through an error if you try to use it. ...
I have recently started experimenting with LLVM under MinGW. I have read the Kaleidoscope tutorial but now I'm having problems with external functions. I'm declaring external functions like this: const Type* doubleType = Type::getPrimitiveType(ctx, Type::DoubleTyID); std::vector<const Type*> doubleParams; doubleParams.push_back(doubleT...
Hi there, I have two c files, foo.c with the functionality and test_foo.c which test the functions of foo.c. Is there a way to access the struct typedef BAR I defined in foo.c in test_foo.c without using a header file? So far, I was able to avoid a h file so that the whole program would consist of foo.c. Thanks. foo.c typedef struc...
Hi, I have a set of global variables and a method in a cpp file. int a; int b; int c; void DoStuff() { } in the header file I have declared them explicitly with the extern keyword. My problem is when I include the header file in another C++ file, I can't use the external variables and the method. It's giving a linker error sayin...
Hi, What is default storage class of a global variable? While searching on web I found, some sites say it is static. But, static means internal linkage and the variable can not be available outside the file scope i.e it should not be available to other object files. But, they still can be accessed to other files using declarations like...
With gnu89: /* share.h */ extern inline void f (void); /* function.c */ void f (void) {} /* main.c */ #include "share.h" int main (int argc, char **argv) { f (); return 0; } With C99: /* share.h */ static inline void f (void) {} /* main.c */ #include "share.h" int main (int argc, char **argv) { f (); return 0; } ...
I would like to create a static (file scope) table of data pointer, data size and data version. The problem is that the data are in external files, but constants in the extern files. Example: file1.c const unsigned char data1[] = { 0x65, 0xF0, 0xA8, 0x5F, 0x5F, 0x5F, 0x5F, 0x31, 0x32, 0x2E, 0x31, 0xF1, 0x63, 0x4...
Should functions be made extern in header files? Or are they extern by default? For example, should I write this: // birthdays.h struct person find_birthday(const char* name); or this: // birthdays.h extern struct person find_birthday(const char* name); Thanks, Boda Cydo. ...