逆置数组reverse

以下是Python中逆置数组的两种方法：
1.使用reverse()函数

arr = [1, 2, 3, 4, 5]
arr.reverse()
print(arr) # 输出：[5, 4, 3, 2, 1]

2.使用切片

arr = [1, 2, 3, 4, 5]
arr = arr[::-1]
print(arr) # 输出：[5, 4, 3, 2, 1]

相关问题

逆置数组

逆置数组就是将数组中的元素顺序颠倒过来。可以使用两个指针分别指向数组的头和尾，然后交换它们所指向的元素，直到两个指针相遇为止。

以下是一个 C 语言实现的逆置数组的示例代码：

#include <stdio.h>

void reverse(int arr[], int size) {
    int i, j;
    for (i = 0, j = size - 1; i < j; i++, j--) {
        int temp = arr[i];
        arr[i] = arr[j];
        arr[j] = temp;
    }
}

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    int size = sizeof(arr) / sizeof(arr[0]);
    reverse(arr, size);
    for (int i = 0; i < size; i++) {
        printf("%d ", arr[i]);
    }
    printf("\n");
    return 0;
}

输出结果为：`5 4 3 2 1`。

c++逆置数组reserve

Sure, here's a sample code for reversing an array in C:

#include <stdio.h>

void reverse(int arr[], int n) {
    int temp;
    for (int i = 0; i < n/2; i++) {
        temp = arr[i];
        arr[i] = arr[n-i-1];
        arr[n-i-1] = temp;
    }
}

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    int n = sizeof(arr)/sizeof(arr[0]);
    reverse(arr, n);
    for (int i = 0; i < n; i++) {
        printf("%d ", arr[i]);
    }
    return 0;
}

This code uses a simple swapping technique to reverse the elements of an array. The `reverse` function takes an array and its size as input, and swaps the first and last elements, then the second and second-to-last elements, and so on, until the entire array is reversed. The `main` function initializes an array, calls the `reverse` function, and then prints the reversed array.