include
main()
{char str[81];
int I,( );
char c;
gats(str);
for(I=0;( )!=’\0’;I++)
if(c==’ ’)word=0;
else if( )
{word=1;
( )}
printf(“There are %d word in line. \n”,num);
}
答案:1、num=0,word=0 2、c=str[I] 3、word==0 4、num++;