指针数组：装满了指针的数组，开发场景，常用作菜单的查找。

此处应用场景模拟查找菜单，查找数组中的查找某个单词。

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

//指针数组经常用于菜单查找
int searchKeyTable(const char* table[], const int size, const char* key, int *pos)
{
    int ret = 0;
    int i = 0;
    int inum = 0;

    //if parameter is null return
    if (table == NULL || key == NULL || pos == NULL)
    {
        ret = -1;
        return ret;
    }


    for ( i = 0; i < size; i++)
    {
        if (strcmp(key, table[i]) == 0)
        {
            *pos = i+1;
            return ret;
        }
    }


    if (i = size)
    {
        *pos = -1;
    }


    return ret;
}


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


int main()
{
    int inum = 0;
    int pos = 0;
    int a[10] = { 0 };

    int i = 0;

    //指针数组，装满了指针的数组，
    char * c_keyword[] = {
        "while",
        "case",
        "static",
        "do",
        0
    };


    searchKeyTable(c_keyword, SIZE(c_keyword), "do", &pos);
    //searchKeyTable(c_keyword, SIZE(c_keyword), 1, &pos);
    printf("pos:%d\n", pos);


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