假设我有2个这样的数据:
x = 1, and {10,20,30}.
我想这样总结:
1 + 10 = 11, 11 + 20 = 31, and 31 + 30 = 61
我的代码。
int x = 1;
int[] arr = {10, 20, 30};
int sum = 0;
for (int i = 0; i < arr.length; i++)
{
sum = arr[i] + x;
}
我明白了:
1 + 10 = 11, 1 + 20 = 21, and 1 + 30 = 31 and so on
如何解决这个问题?
答案 0 :(得分:4)
将sum
初始化为x
,并将arr[i]
的值添加到sum
,而不要将sum
设置为arr[i] + x
。
int sum = x; // You only want to add x once, so just say the sum is equal to x
for (int i = 0; i < arr.length; i++)
{
// You didn´t sum the values up, you just said the sum is equal to your
// x value plus the element at arr[i]
sum += arr[i];
}
答案 1 :(得分:3)
你可以这样做
int[] arr = {10, 20, 30};
int x = 1;
int sum = x;
for (int i = 0; i < arr.length; i++)
{
sum = sum + arr[i];
}
您只需要为之前获得的总和添加新值。
所以它就像sum = sum+next_item
答案 2 :(得分:0)
也尝试使用FOR EACH
int sum = 0;
for (int no:arr){
sum += no;
}