ISO C++ forbids member initialization within a struct [closed]

StackOverflow https://stackoverflow.com//questions/25002526

Question

I'm writing an emulator and decided to control input/output emulation within a struct:

struct callbacks
{
short LastFrequency = 9000;
 int *MMIO_RANGE1;
 short Cycle_LN = 65535 / LastFrequency;
 const char *STATUS_FLAGS[] =
 {
   "ACK",
   "NO_VIB",
   "DATA",
   "BYTEPACK",
   "WORDPACK"
 };
}

This code above looks fine to me and seems to obey all of the rules ... but I get the error message as stated in the title above. I searched around and people say that the error means different things ... but what is it?

The problem is pointed towards "LastFrequency".

Was it helpful?

Solution

Two things: add a 5 and a ;

Also: make sure to compile with -std=c++11 (or -std=c++0x for older g++ versions, or the equivalent options for your compiler of choice), because in-class initializers are a C++11 feature.

BIG WARNING: this code is NOT supported by gcc 4.6 and requires gcc >= 4.7.3

struct callbacks
{
short LastFrequency = 9000;
 int *MMIO_RANGE1;
 short Cycle_LN = 65535 / LastFrequency;
 const char *STATUS_FLAGS[5] = // <-- 5 here
 {
   "ACK",
   "NO_VIB",
   "DATA",
   "BYTEPACK",
   "WORDPACK"
 };
}; // <-- ; here

int main() 
{

}

Live Example.

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