#include <stdio.h>
#include <ctype.h>

int main(void)
{
    char ch;
    printf("please type in a letter: type # to end my act.\n");
    while((ch = getchar()) != '#')
    {
        if('\n' == ch)
            continue;
        if(islower(ch))
            switch(ch)
            {
                case 'a':
                    printf("argali\n");
                    break;
                case 'b':
                    printf("babirusa\n");
                    break;
                case 'c':
                    printf("coati\n");
                    break;
                case 'd':
                    printf("desman\n");
                    break;
                case 'e':
                    printf("echidna\n");
                    break;
                case 'f':
                    printf("fisher\n");
                    break;
                default:
                    printf("That's a stumper!\n");
            }
        else
            printf("I recognize only lowercase letters.\n");
        while(getchar() != '\n')
            continue;
        printf("Please type another letter or a #.\n");
    }
    printf("Bye!\n");
    getchar();
    getchar();
    return 0;
}

上面这个循环是不是就起到了这样的功能？

getchar（）每回重缓冲区取走一个字符，被取走的相当于被它吃掉了
while(getchar() != '\n')
            continue;   
上面代码的意思是从它取走的字符里面如果没有遇到回车符，就一直循环，也就是一直取

嗯~~~~getchar() 就是从缓存区取走一个字符，但是你没有把它赋给一个变量，相当于被吃掉了··