C语言使用缓冲区实例

/* guess.c -- an inefficient and faulty number-guesser */
#include <stdio.h>
int main(void)
{
    int guess = 1;

    printf("Pick an integer from 1 to 100. I will try to guess ");
    printf("it.\nRespond with a y if my guess is right and with");
    printf("\nan n if it is wrong.\n");
    printf("Uh...is your number %d?\n", guess);
    while (getchar() != 'y')      /* get response, compare to y */
        printf("Well, then, is it %d?\n", ++guess);
    printf("I knew I could do it!\n");

    return 0;
}