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);
}
}
