#include <stdio.h>
int main()
{
	char string[81];
	int i,num=0,word=0;
	char c;
	gets(string);	//输入一个字符串给字符数组string
	for(i=0;(c=string[i])!='\0';i++) 	//只要字符不是'\0'就循环
		if(c==' ') word=0;		//若是空格字符，使word置0
else if(word==0)	//如果不是空格字符且word原值为0
		{	word=1;		//使word置1
			num++; 		//num累加1，表示增加一个单词
		}
	printf("There are %d words in this line.\n",num);	  //输出单词数
	return 0;
    }
 

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