关于智能合约中数组的问题

Question

contract Donate{
uint size = 0;

struct DonateInfo{
    uint id;
    uint value;
    uint time;
}

DonateInfo[] public list;

/* function get(unit index) returns (DonateInfo){
DonateInfo result = list[index];
return result;

}*/
function lengthOf() returns (uint len) {
uint result = list.length;
return result;

}

function put(uint id, uint value, uint time) returns (uint len) {
   DonateInfo info;
  info.id =id;
  info.value=value;
  info.time=time;
   list.push(info);
    size++;
    return size;
}
 function valueOf(uint _index) returns (DonateInfo) {
DonateInfo result = list[_index];
return result;

}
}

上面是我写的智能合约，不知道为什么第一次调用PUT方法后，数组的长度就会是2,求大神拯救

Answer 1

http://blog.csdn.net/u013137970/article/details/53023115