#include <stdio.h>

#define Num 10

int main()

{

    int wor = 0;

    int arr[Num] = {0};

    int c,count = 0,i;

    int flag = 0;

    printf("Please input at most 10 words.\n");

    while((c = getchar()) != EOF)

    {

        if(c == '\n' ||c == ' ' || c == '\t')

            {

                if(flag == 0)

                {

                    arr[count] = wor;

                    count++;

                    wor = 0;

                    flag = 1;

                }

            }

        else

            {

                flag = 0;

                wor++;

            }

    }

    for(i = 0;i < count;i++)

        printf("%d ",arr[i]);

    return 0;

}

两个问题：首次输入不能是空符；最多10个字符。以后解决 。