為啥int定義過的不能在再添加int定義?
public?class?HelloWorld{
????public?static?void?main(String[]?args)?{
????int?one?=?10?;
????????int?two?=?20?;
????????int?three?=?0?;
????????three?=?one?+?two;
????????System.out.println("three?=?one?+?two?==>?"?+?three);
????????three?+=?one;
????????System.out.println("three?+=?one?==>?"?+?three);
????????three?-=?one;
????????System.out.println("three?-=?one?==>?"?+?three);
????????three?*=?one;
????????System.out.println("three?*=?one?==>?"?+?three);
????????three?/=?one;
????????System.out.println("three?/=?one?==>?"?+?three);
????????three?%=?one;
????????System.out.println("three?%=?one?==>?"?+?three);
}
}我看了下問答，有人說three=one+two前面不用加上int，是因為前面已經定義過了，不用打上去。
那我有個疑問，那為啥打上去int會報錯？看起來即時打上int也不會影響算法，那為什么會報錯？求各位指教。
2016-04-26
前面定義過了three不能重復定義