# include <stdio.h>
# include <string.h>
int main()
{
    char string[81];
    int i,word = 0, num = 0;
    char c;

    gets(string);

    for(i = 0;(c = string[i])!='\0';i++)    // 和 for(i=0;(c = string[i] != '\0');i++) 的区别？顺便解释下后者的意义
        
        if(c == ' ')
            word = 0;
        
        else if(word == 0)
        {
            word = 1;
            num++;
        }
        
    printf("There is %d words in this line.\n", num);
    return 0;
}

那后面的循环怎么样才算结束了呢？