c - 如何解决此程序中重复扫描的问题？

Question

这个问题已经有答案了:

Scanf skips every other while loop in C (10 个回答)

C skipping one command of a function? [duplicate] (2 个回答)

已关闭 6 年前。

所以这个程序应该猜测你心中想到的一个数字。但如果你运行它并在问你第一个问题后看到它不再需要输入。

#include <stdio.h>
#include <stdlib.h>

int main(){
printf("Enter the upper limit for the range of numbers:\n");
int n;
scanf("%d", &n);
int low=0;
int high=n;
printf("Answers should only be y for yes or n for no.\n");
do{
    int median;
    median=(high+low)/2;
    printf("Is your number greater than %d median?\n", median);
    char ans;
    scanf("%c", &ans);
    if(ans=='y' || ans=='Y'){
        low=median;
        continue;
    }
    else{
        printf("Is your number smaller than %d median?\n", median);
        scanf("%c", &ans);
        if(ans=='y' || ans=='Y'){
            high = median;
            continue;
        }
        else
        {
           low = high = median;
        }
        }
}while(low != high);
printf("Your number is: %d\n", low);
return 0;

}

Answer 1

试试这个:

scanf(" %c", &ans);

而不是

scanf("%c", &ans);