英文:
How do I recursively count up to less than n
问题
我在处理循环和数组的应用问题时遇到困难。
我有一个变量 "n" 代表循环的限制，即
如果 n = 3，则数组看起来像:
arr[1,2,3,1,2,3,1,2,3];
或者如果 n = 4，则它看起来像:
arr[1,2,3,4,1,2,3,4,1,2,3,4,1,2,3,4];
以下是我的代码，有人请告诉我在实现上述问题时犯了什么错误...
public static void main(String[] args) {
countingUp(3);
}
public static void countingUp(int n) {
int[] arr = new int[n * n];
int k = n;
for(int i = 0; i < n; i++) {
for(int j = 0; j < n; j++) {
arr[i] = n ;
}
}
System.out.println(Arrays.toString(arr));
}
请检查你的代码，你在循环中没有正确更新数组元素的值。
英文:
I am struggling with the problem of having applications of loops and arrays.
I have a variable "n" which represents the limit of the loop, i.e.
if n = 3, the array would look like:
arr[1,2,3,1,2,3,1,2,3];
or if n = 4, it would look like:
arr[1,2,3,4,1,2,3,4,1,2,3,4,1,2,3,4];
here's my code so far, someone please let me know the mistake I have made in implementing the above problem...
public static void main(String[] args) {
countingUp(3);
}
public static void countingUp(int n) {
int[] arr = new int[n * n];
int k = n;
for(int i = 0; i < n; i++) {
for(int j = 0; j < n; j++) {
arr[i] = n ;
}
}
System.out.println(Arrays.toString(arr));
}
答案1
得分: 1
This is the major mistake you have done...
>arr[i] = n ;
You should update value after each interval of length n which can be controlled by the loop running with i and the value inside each interval could be controlled with the loop j. See that one change I have made in the code below...
这是你犯的主要错误...
>arr[i] = n;
在每个长度为n的间隔之后，您应该更新值，这可以由运行i的循环控制，每个间隔内的值可以由循环j控制。请看下面代码中我所做的一项更改...
public static void main(String[] args) {
countingUp(3);
}
public static void countingUp(int n) {
int[] arr = new int[n * n];
int k = n;
for(int i = 0; i < n; i++) {
for(int j = 0; j < n; j++) {
arr[i*n+j] = j+1 ;
}
}
System.out.println(Arrays.toString(arr));
}
英文:
This is the major mistake you have done...
>arr[i] = n ;
You should update value after each interval of length n which can be controlled by the loop running with i and the value inside each interval could be controlled with the loop j. See that one change I have made in the code below...
public static void main(String[] args) {
countingUp(3);
}
public static void countingUp(int n) {
int[] arr = new int[n * n];
int k = n;
for(int i = 0; i < n; i++) {
for(int j = 0; j < n; j++) {
arr[i*n+j] = j+1 ;
}
}
System.out.println(Arrays.toString(arr));
}
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