代码如下，

#include<stdio.h>
#define Wordnumber 100
#define Maxwords 10
int main()
{
    char words[Maxwords][Wordnumber];
    int countwords(char words[Maxwords][Wordnumber], int i);
    int word_counter[Maxwords];
    int is,temp = 0;
    int k = 0;
    int j = 0;
    printf("Please enter the word:\n");
    for (is=0; is<10; is++)
    {
        gets_s(words[is]);
        if (words[is] == "exit")
        {
            break;
        }
    }
    //进行单词数叠加（此处报错
    for (j = 0; j<10; j++)
    {
        word_counter[j] = countwords(words[j], j);
        k = k + word_counter[j];
    }

    //排序
    for (is=0; is<10; is++)
    {
        for (j; j<10 - is; j++)
        {
            if (word_counter[j]>word_counter[j + 1])
            {
                temp = word_counter[j + 1];
                word_counter[j + 1] = word_counter[j];
                word_counter[j] = temp;
            }
        }
    }
    k = word_counter[9] * 11 - k;
    printf("%d", k);
    return 0;
}

int countwords(char words[Maxwords][Wordnumber], int i)
{
    int roundtime = 0;
    static int blank = 0;
    int blankspace = 0;
    while (roundtime != 0)
    {
        for (blank; blank<Wordnumber; blank++)
        {
            if (words[i][blank] == ' ')
            {
                blankspace++;
            }
            if (words[i][blank] == NULL)
            {
                roundtime++;
                break;
            }
        }
    }
    return blankspace + 1;
}

//     error C2664: “int countwords(char [][100],int)”: 无法将参数 1 从“char [100]”转换为“char [][100]”

c语言初学者，ide为VS2013，无法实现数单词的功能。