求大佬回答一下，挺急的

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define NUM(a) (sizeof(a)/sizeof(*a))

int searchKeyTable(const char* table[], const int size,
	const char* key, int* pos)
{
	if (table == NULL || key == NULL || pos == NULL)
	{
		return -1;
	}

	int n = -1;
	for (int i = 0; i < size; i++)
	{
		if (strcmp(table[i], key) == 0)
		{
			n = i;
			break;
		}
	}

	if (n == -1)
	{
		printf("无此字符串\n");
		return -2;
	}

	*pos = n + 1;

	return 0;
}

int main()
{
	char* keywords[] = {
		"while",
		"case",
		"static",
		"do"
	};
	int ret = 0;
	int size = NUM(keywords);
	int pos = 0;
	char* key = "do";

	ret = searchKeyTable(keywords, size, key, &pos);
	if (ret != 0)
	{
		printf("searchKeyTable error:%d\n", ret);
		return ret;
	}
	printf("'%s'的位置是：%d\n", key, pos);

	printf("\n");
	system("pause");
	return 0;
}

int fun(int x, int s[]) {
    int index = -1;
    int size = sizeof(s) / sizeof(s[0]);    // 数组个数

    for (int i = 0; i < size; i++) {
        if (s[i] == x) {
            index = i;
            break;
        }
    }

    return index;
}