需要將數組中大于輸入數字的所有數字相加。種子只是為了可以復制輸出。例子：[12,16,45,3,32]輸入值：30輸出：77import java.util.*; public class SumAbove { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); int seed = scnr.nextInt(); Random rand = new Random(seed); System.out.println("Enter a positive integer between 1-100 to search above:"); int minVal = scnr.nextInt(); int[] arr = new int[rand.nextInt(100)+1]; for (int i=0; i<arr.length; i++) { arr[i] = rand.nextInt(100)+1; } System.out.println(Arrays.toString(arr)); int sum = 0; for (int i=0; i<arr.length; i++) { if (arr[i]>minVal) { sum += i; } } System.out.println(sum); } }
4 回答
狐的傳說
TA貢獻1804條經驗 獲得超3個贊
sum += i;您sum += arr[i];也只需要一個循環（因為您知道第一個循環之前的最小值），而不是您想要的（如前所述）。喜歡，
int minVal = scnr.nextInt(), sum = 0;
int[] arr = new int[rand.nextInt(100) + 1];
for (int i = 0; i < arr.length; i++) {
arr[i] = rand.nextInt(100) + 1;
if (arr[i] > minVal) {
sum += arr[i];
}
}
System.out.println(Arrays.toString(arr));
System.out.println(sum);
繁花如伊
TA貢獻2012條經驗 獲得超12個贊
public static void main(String[] args) {
int nums[] = { 12, 16, 45, 3, 32 };
int value;
int sum = 0;
System.out.println("Enter a positive integer between 1-100 to search above: ");
Scanner sc = new Scanner(System.in);
value = sc.nextInt();
for (int i = 0; i < nums.length; i++) {
if (nums[i] > value)
sum = nums[i] + sum;
}
System.out.println(sum);
}
慕俠2389804
TA貢獻1719條經驗 獲得超6個贊
以下是如何在 Java 8+ 中使用流來實現這一點。
int nValues = 5;
int minValue = 1;
int maxValue = 30;
Random r = new Random();
for (int i = 0; i < 10; i++) {
int[] values = r.ints(nValues, minValue, maxValue + 1).toArray();
// min to sum is the threshold
int minToSum = r.nextInt(7) + 10; // between 10 an 16 inclusive
int sum = Arrays.stream(values).filter(m -> m > minToSum).sum();
System.out.println("sum = " + sum + " for greater than " + minToSum
+ " : " + Arrays.toString(values));
}
以下輸出。
sum = 65 for values greater than 11 : [2, 10, 14, 23, 28]
sum = 92 for values greater than 10 : [13, 18, 15, 19, 27]
sum = 94 for values greater than 12 : [25, 6, 14, 25, 30]
sum = 54 for values greater than 10 : [14, 8, 14, 26, 5]
sum = 22 for values greater than 15 : [15, 8, 13, 22, 14]
sum = 28 for values greater than 13 : [3, 28, 9, 6, 5]
sum = 87 for values greater than 13 : [5, 18, 25, 21, 23]
sum = 31 for values greater than 13 : [16, 7, 12, 2, 15]
sum = 42 for values greater than 15 : [7, 22, 20, 10, 5]
sum = 40 for values greater than 12 : [2, 2, 13, 27, 9]
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