Java之i=i++

count = count++;原理是

temp = count； 
count = count+1； 
count = temp；

因此count始终是0

代码如下：

public class CountPlus {
    public static void main(String[] args) {
        int count = 0;
        int num = 0;
        for (int i = 0; i <= 100; i++){
            num = num + i;
            count = count++;
        }
        System.out.println(num * count);
    }
}

运行结果： 0

将count = count++;换成count++;

运行结果： 510050