计算单词数量

#include<stdio.h>

int main()

{

char string[81];

int i,num=0,word=0;

char c;

gets(string);

for(i=0;(c=string[i])!='\0';i++)

 if(c==' ') word=0;

 else if(word==0)

  {word=1;

      num++;

  }

printf("There are %d words in this line.\n",num);

return 0;

}