练习1-12

1-12 编写一个程序,以每行一个单词的形式打印其输出.

 

#include<stdio.h>
#define IN 1 //在单词内
#define OUT 0 //在单词外
int main()
{
    int c;
    int state = OUT;
    while ((c = getchar()) != EOF)
    {
        if (c == ' ' || c == '\n' || c == '\t')
        {
            if (state==IN)
            {
                putchar('\n');
                state = OUT;
            }
            
        }
        else if (state == OUT)
        {
            state = IN;
            putchar(c);
        }
        else
        {
            putchar(c);
        }
    }
    return 0;
}