http://stackoverflow.com/questions/201101/how-to-initialize-an-array-in-c
If your compiler is GCC you can use following syntax:
int array[1024]={[0...1023]=5};
//================================================================================================================
// description, initialize a array
//----------- header x_marco.h
// Marco filter (var_name, array_index, var_value)
MARCO_ITEM_FILTER(name_1, [0] , 8 )
MARCO_ITEM_SHOW(name_2, [1], 21)
MARCO_ITEM_SHOW(name_3, [2], 7 )
MARCO_ITEM_SHOW(name_4, [3], 9 )
MARCO_ITEM_FILTER(name_5, [4], 18)
//---------- c code main.c
// we need initial an array g_value_array[5] with the initial value described in x_marco.h
#define MARCO_ITEM_FILTER(var_name, array_index, var_value) var_name
#define MARCO_ITEM_SHOW(var_name, array_index, var_value) var_name,
enum { // enum{
// name_1,
#include x_marco.h // name_2,
kNumberOfShowItem // name_3,
}; // name_4,
// name_5,
// kItemNumber
// };
// in here, we get kItemNumber = 5
#undef MARCO_ITEM_FILTER
#undef MARCO_ITEM_SHOW
#define MARCO_ITEM_FILTER(var_name, array_index, var_value) /* filter out useless item */
#define MARCO_ITEM_SHOW(var_name, array_index, var_value) array_index = var_value,
int g_value_array[kItemNumber] = { // int g_value_array[5] = {
#include x_marco.h // [1] = 21,
}; // [2] = 7 ,
// [3] = 9,
// }
#undef MARCO_ITEM_FILTER
#undef MARCO_ITEM_SHOW
int main(void)
{
for(int item = 0; item < kItemNumber; ++item}{
std::cout << "item index " << item << " = " << g_value_array[item] << endl;
}
return 0;
}
//--------- output
>> item index 0 = 0
>> item index 1 = 21
>> item index 2 = 7
>> item index 3 = 9
>> item index 4 = 0
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