#include <stdio.h>
int main(void){
    int guess = 1;
    char response;

    printf("is your number %d?\n", guess);
    while ((response = getchar()) != "y")     /* get response */
    {
        if (response == "n")
            printf("Well, then, is it %d?\n", ++guess);
        else
            printf("Sorry, I understand only y or n.\n");
        while (getchar() != "\n")
            continue;                 /* skip rest of input line */
    }
   
    return 0;
}