C compile error: “Variable-sized object may not be initialized”

Question

Why do I receive the error \"Variable-sized object may not be initialized\" with the following code?

int boardAux[length][length] = {{0}};

Answer 1

int size=5;
int ar[size ]={O};

/* This  operation gives an error -  
variable sized array may not be 
initialised.  Then just try this. 
*/
int size=5,i;
int ar[size];
for(i=0;i