9. What is ‘sum’ after the following loop terminates?bint sum = 0;
int item = 0;
do
{
item++;
sum += item;
if (sum > 4) sum = sum/2;
}
while (item < 5);
最好能告诉为什么,谢谢
int item = 0;
do
{
item++;
sum += item;
if (sum > 4) sum = sum/2;
}
while (item < 5);
最好能告诉为什么,谢谢
//因为if(sum > 4)没有加括号,所以这句话没用,后面语句总会执行...、
循环1次
item = 1
sum = 1 //sum += item 就是 sum = sum + item
sum / 2 = 0.5 = 0 //int 型省略小数点后的数
循环2次
item = 2
sum = 2.5
sum / 2 = 1.25 = 1
循环3次
item = 3
sum = 4
sum / 2 = 2
循环4次
item = 4
sum = 6
sum / 2 = 3
循环5次 //注意,do while 是先执行再判断,所以有第五次
item = 5
sum = 8
sum / 2 = 4都是基础,好好看看书