<输入一行字符，统计其有多少个单词>#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);}