C语言实现判断一句话中有几个单词

#include <stdio.h>void 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 the line.\n",num);}