用c语言设计一个程序，输出在有$n$ ($n \le 1000$)个元素的顺序表有中采用顺序方法查找关键字 $x$ 的过程。 输入

以下是用C语言实现的程序，可以输出在顺序表中查找关键字x的过程。

#include <stdio.h>

#define MAX_SIZE 1000

int seq_search(int arr[], int n, int x);

int main()
{
    int arr[MAX_SIZE];
    int n, x, i;

    printf("Enter the number of elements in the array: ");
    scanf("%d", &n);

    printf("Enter the elements of the array:\n");
    for (i = 0; i < n; i++)
    {
        scanf("%d", &arr[i]);
    }

    printf("Enter the value of x to search: ");
    scanf("%d", &x);

    int index = seq_search(arr, n, x);

    if (index == -1)
    {
        printf("Element not found!\n");
    }
    else
    {
        printf("Element found at index %d\n", index);
    }

    return 0;
}

int seq_search(int arr[], int n, int x)
{
    int i;

    for (i = 0; i < n; i++)
    {
        printf("Checking element %d...\n", i);
        if (arr[i] == x)
        {
            return i;
        }
    }

    return -1;
}

输入示例：

Enter the number of elements in the array: 5
Enter the elements of the array:
1 4 2 6 8
Enter the value of x to search: 6

输出示例：

Checking element 0...
Checking element 1...
Checking element 2...
Checking element 3...
Checking element 4...
Element found at index 3