练习1-12

 

int main(void)
{
    int ch;
    int last = BLANK;
	while( ( ch = getchar() ) != EOF)
	{
		if( ch == ' ' || ch == '\n' || ch == '\t')
		{
			if( last == WORD )
            {
			    putchar( '\n' );
			    last = BLANK;
            }
		}
		else
		{
			putchar( ch );
			last = WORD;
		}
	}
    return 0;
}

 每行一个单词的形式打印其输出