C/C++ :: Recursive Functions With Arrays As Parameters

I wrote a fuction in C with the prototype

'void raisePowerOf2(int array[],int pow);'

If someone want to find the value of 2^456 ,just have to invoke this function 456 as the value for pow and int array with 2 elements :1 & -1 as the argument for the array.(There I used -1 to denote the end of the array.)

But it seems that this function doesn't give the exact answer

And I tried this from java also,with the same implementation.It produced the answer precisely .

I tried for hours, but unable to detect reasons why this code blok in C doesn't work properly .

This is the code in c

#include<stdio.h>
void raisePowerOf2(int array[],int pow);
int main(){
    int a[2]={1,-1};
    raisePowerOf2(a,5);  
    return 0;
}  void raisePowerOf2(int array[],int pow){

[Code] ....